@ -121,10 +121,10 @@ coordinate many different backup utilities. `GPL-2.0` `Shell`
*Build and software organization tools.*
*Build and software organization tools.*
- [EasyBuild](https://easybuild.readthedocs.org/en/latest/) - EasyBuild builds software and modulefiles for High Performance Computing (HPC) systems in an efficient way.
- [EasyBuild](https://easybuild.io/) - EasyBuild builds software and modulefiles for High Performance Computing (HPC) systems in an efficient way. ([Source Code](https://github.com/easybuilders/easybuild-easyconfigs)) `GPL-2.0``Python`
- [environment-modules Lmod](https://www.tacc.utexas.edu/research-development/tacc-projects/lmod) - Lmod is a Lua based module system that easily handles the MODULEPATH Hierarchical problem.
- [environment-modules Lmod](https://www.tacc.utexas.edu/research-development/tacc-projects/lmod) - Lmod is a Lua based module system that easily handles the MODULEPATH Hierarchical problem. ([Source Code](https://github.com/TACC/Lmod)) `MIT``Lua`
- [HPCBIOS](http://hpcbios.readthedocs.org/en/latest/) - HPCBIOS is an effort to setup a common, well-documented and reproducible, environment spanning across multiple HPC systems & sites, *inclusive* of documentation.
- [HPCBIOS](http://hpcbios.readthedocs.org/en/latest/) - HPCBIOS is an effort to setup a common, well-documented and reproducible, environment spanning across multiple HPC systems & sites, *inclusive* of documentation.
- [Spack](https://spack.io/) - A flexible package manager that supports multiple versions, configurations, platforms, and compilers.
- [Spack](https://spack.io/) - A flexible package manager that supports multiple versions, configurations, platforms, and compilers. ([Source Code](https://github.com/spack/spack)) `MIT/Apache-2.0``Python`
- [CloudSlang](http://www.cloudslang.io/) - Flow-based orchestration tool for managing deployed applications, with Docker capabilities. ([Source Code](https://github.com/CloudSlang/score))
- [CloudSlang](http://www.cloudslang.io/) - Flow-based orchestration tool for managing deployed applications, with Docker capabilities. ([Source Code](https://github.com/CloudSlang/score))`Apache-2.0``Java`
- [CloudStack](http://cloudstack.apache.org/) - Cloud computing software for creating, managing, and deploying infrastructure cloud services. ([Source Code](https://github.com/apache/cloudstack))
- [CloudStack](http://cloudstack.apache.org/) - Cloud computing software for creating, managing, and deploying infrastructure cloud services. ([Source Code](https://github.com/apache/cloudstack))`Apache-2.0``Java/Python`
- [Cobbler](http://cobbler.github.io/) - Cobbler is a Linux installation server that allows for rapid setup of network installation environments. ([Source Code](https://github.com/cobbler/cobbler))
- [Cobbler](http://cobbler.github.io/) - Cobbler is a Linux installation server that allows for rapid setup of network installation environments. ([Source Code](https://github.com/cobbler/cobbler))`GPL-2.0``Python`
- [Genesis](https://github.com/starkandwayne/genesis) - A template framework for multi-environment BOSH deployments.
- [Genesis](https://github.com/starkandwayne/genesis) - A template framework for multi-environment BOSH deployments.`MIT``Perl`
- [Overcast](http://andrewchilds.github.io/overcast/) - Deploy VMs across different cloud providers, and run commands and scripts across any or all of them in parallel via SSH. ([SOurce Code](https://github.com/andrewchilds/overcast))
- [Overcast](http://andrewchilds.github.io/overcast/) - Deploy VMs across different cloud providers, and run commands and scripts across any or all of them in parallel via SSH. ([Source Code](https://github.com/andrewchilds/overcast))`MIT``Nodejs`
- [Collins](http://tumblr.github.io/collins/) - At Tumblr, it's the infrastructure source of truth and knowledge.
- [Collins](http://tumblr.github.io/collins/) - At Tumblr, it's the infrastructure source of truth and knowledge. ([Source Code](https://github.com/tumblr/collins)) `Apache-2.0``Docker/Scala`
- [i-doit](http://www.i-doit.org/) - IT Documentation and CMDB.
- [i-doit](http://www.i-doit.org/) - IT Documentation and CMDB.`AGPL-3.0``PHP`
- [iTop](http://www.combodo.com/itop-193) - Complete ITIL web based service management tool.
- [iTop](http://www.combodo.com/itop-193) - Complete ITIL web based service management tool. ([Source Code](https://sourceforge.net/projects/itop/files/)) `AGPL-3.0``PHP`
- [netbox](https://github.com/digitalocean/netbox) - IP address management (IPAM) and data center infrastructure management (DCIM) tool
- [netbox](https://netbox.dev/) - IP address management (IPAM) and data center infrastructure management (DCIM) tool. ([Demo](https://demo.netbox.dev/), [Source Code](https://github.com/netbox-community/netbox)) `Apache-2.0``Python`
[Configuration management (CM)](https://en.wikipedia.org/wiki/Configuration_management) is a systems engineering process for establishing and maintaining consistency of a product's performance, functional, and physical attributes with its requirements, design, and operational information throughout its life.
[Configuration management (CM)](https://en.wikipedia.org/wiki/Configuration_management) is a systems engineering process for establishing and maintaining consistency of a product's performance, functional, and physical attributes with its requirements, design, and operational information throughout its life.
- [CFEngine](https://cfengine.com/) - Configuration management system for automated configuration and maintenance of large-scale computer systems. ([Source Code](https://github.com/cfengine/core))
- [CFEngine](https://cfengine.com/) - Configuration management system for automated configuration and maintenance of large-scale computer systems. ([Source Code](https://github.com/cfengine/core))`GPL-3.0``C`
- [Chef](https://www.chef.io/products/chef-infra) - Configuration management tool using a pure-Ruby, domain-specific language (DSL) for writing system configuration "recipes". ([Source Code](https://github.com/chef/chef))
- [Chef](https://www.chef.io/products/chef-infra) - Configuration management tool using a pure-Ruby, domain-specific language (DSL) for writing system configuration "recipes". ([Source Code](https://github.com/chef/chef))`Apache-2.0``Ruby`
- [Puppet](https://www.puppet.com/) - Software configuration management tool which includes its own declarative language to describe system configuration. ([Source Code](https://github.com/puppetlabs/puppet))
- [Puppet](https://www.puppet.com/) - Software configuration management tool which includes its own declarative language to describe system configuration. ([Source Code](https://github.com/puppetlabs/puppet))`Apache-2.0``Ruby/C`
- [Salt](https://docs.saltproject.io/) - Event-driven IT automation, remote task execution, and configuration management software. ([Source Code](https://github.com/saltstack/salt))
- [Salt](https://docs.saltproject.io/) - Event-driven IT automation, remote task execution, and configuration management software. ([Source Code](https://github.com/saltstack/salt))`Apache-2.0``Python`
*Tools and scripts to support deployments to your servers.*
*Tools and scripts to support deployments to your servers.*
- [Capistrano](http://capistranorb.com/) - Deploy your application to any number of machines simultaneously, in sequence or as a rolling set via SSH (rake based).
- [Capistrano](http://capistranorb.com/) - Deploy your application to any number of machines simultaneously, in sequence or as a rolling set via SSH (rake based). ([Source Code](https://github.com/capistrano/capistrano)) `MIT``Ruby`
- [Fabric](http://www.fabfile.org/) - Python library and cli tool for streamlining the use of SSH for application deployment or systems administration tasks.
- [Fabric](http://www.fabfile.org/) - Python library and cli tool for streamlining the use of SSH for application deployment or systems administration tasks. ([Source Code](https://github.com/fabric/fabric)) `BSD-2-Clause``Python`
- [Mina](http://nadarei.co/mina/) - Really fast deployer and server automation tool (rake based).
- [Mina](http://nadarei.co/mina/) - Really fast deployer and server automation tool (rake based). ([Source Code](https://github.com/mina-deploy/mina)) `MIT``Ruby`
- [munki](https://www.munki.org/munki/) - Webserver-based repository of packages and package metadata, that allows macOS administrators to manage software installs.
- [munki](https://www.munki.org/munki/) - Webserver-based repository of packages and package metadata, that allows macOS administrators to manage software installs. ([Source Code](https://github.com/munki/munki)) `Apache-2.0``Python`
- [Vlad the Deployer](https://github.com/seattlerb/vlad) - Deployment automation (rake based).
- [Vlad the Deployer](https://github.com/seattlerb/vlad) - Deployment automation (rake based).`MIT``Ruby`
*Tools used to create diagrams of networks, flows, etc.*
*Tools used to create diagrams of networks, flows, etc.*
- [Diagrams.net](https://app.diagrams.net/) - A.K.A. [Draw.io](https://app.diagrams.net/). Easy to use Diagram UI with a plethora of templates.
- [Diagrams.net](https://app.diagrams.net/) - A.K.A. [Draw.io](https://app.diagrams.net/). Easy to use Diagram UI with a plethora of templates. ([Source Code](https://github.com/jgraph/drawio)) `Apache-2.0``JavaScript/Docker`
- [DrawThe.Net](http://go.drawthe.net/) - Javascript tool that uses a YAML-formatted input to programmatically create large, complex, and visually solid diagrams.
- [DrawThe.Net](http://go.drawthe.net/) - Javascript tool that uses a YAML-formatted input to programmatically create large, complex, and visually solid diagrams. ([Source Code](https://github.com/cidrblock/drawthe.net)) `MIT``JavaScript`
- [Kroki](https://kroki.io) - API for generating diagrams from textual descriptions. ([Source Code](https://github.com/yuzutech/kroki)) `MIT``Java`
- [Kroki](https://kroki.io) - API for generating diagrams from textual descriptions. ([Source Code](https://github.com/yuzutech/kroki)) `MIT``Java`
- [Mermaid](https://mermaid-js.github.io/mermaid-live-editor/) - Javascript module with a unique, easy, shorthand syntax. Integrates into several other tools like Grafana.
- [Mermaid](https://mermaid-js.github.io/mermaid-live-editor/) - Javascript module with a unique, easy, shorthand syntax. Integrates into several other tools like Grafana. ([Source Code](https://github.com/mermaid-js/mermaid-live-editor)) `MIT``Nodejs/Docker`
- [Atom Community](https://github.com/atom-community/atom) - A fork of [atom](https://github.com/atom/atom) A hackable text editor from Github.
- [Atom Community](https://github.com/atom-community/atom) - A fork of [atom](https://github.com/atom/atom) A hackable text editor from Github.`MIT``JavaScript`
- [Brackets](http://brackets.io/) - Code editor for web designers and front-end developers.
- [Brackets](http://brackets.io/) - Code editor for web designers and front-end developers. ([Source Code](https://github.com/brackets-cont/brackets)) `MIT``JavaScript`
- [Eclipse](http://www.eclipse.org/) - IDE written in Java with an extensible plug-in system.
- [Eclipse](http://www.eclipse.org/) - IDE written in Java with an extensible plug-in system. ([Source Code](https://git.eclipse.org/c/)) `EPL-1.0``Java`
- [Geany](http://www.geany.org/) - GTK2 text editor.
- [Geany](http://www.geany.org/) - GTK2 text editor. ([Source Code](https://github.com/geany/geany)) `GPL-2.0``C/C++`
- [GNU Emacs](http://www.gnu.org/software/emacs/) - An extensible, customizable text editor-and more.
- [GNU Emacs](http://www.gnu.org/software/emacs/) - An extensible, customizable text editor-and more. ([Source Code](https://github.com/emacs-mirror/emacs)) `GPL-3.0``C`
- [Haroopad](http://pad.haroopress.com/) - Markdown editor with live preview.
- [Haroopad](http://pad.haroopress.com/) - Markdown editor with live preview. ([Source Code](https://github.com/rhiokim/haroopad)) `GLP-3.0``JavaScript`
- [ICEcoder](https://icecoder.net/) - Code editor awesomeness, built with common web languages.
- [ICEcoder](https://icecoder.net/) - Code editor awesomeness, built with common web languages. ([Demo](http://demo.icecoder.net), [Source Code](https://github.com/icecoder/ICEcoder)) `MIT``PHP`
- [KDevelop](https://www.kdevelop.org/) - IDE by the people behind KDE.
- [KDevelop](https://www.kdevelop.org/) - IDE by the people behind KDE. ([Source Code](https://invent.kde.org/kdevelop/kdevelop)) `GFDL-1.2``C++`
- [Micro](https://micro-editor.github.io/) - A modern and intuitive terminal-based text editor
- [Micro](https://micro-editor.github.io/) - A modern and intuitive terminal-based text editor. ([Source Code](https://github.com/zyedidia/micro)) `MIT``Go`
- [Nano](http://nano-editor.org) - Easy to use, customizable text editor.
- [Nano](http://nano-editor.org) - Easy to use, customizable text editor. ([Source Code](https://git.savannah.gnu.org/cgit/nano.git/tree/)) `GPL-3.0``C`
- [Notepad++](https://notepad-plus-plus.org/) - GPLv2 multi-language editor with syntax highlighting for Windows.
- [Notepad++](https://notepad-plus-plus.org/) - GPLv2 multi-language editor with syntax highlighting for Windows. ([Source Code](https://github.com/notepad-plus-plus/notepad-plus-plus)) `GPL-2.0``C++`
- [TextMate](https://github.com/textmate/textmate/) - A graphical text editor for OS X.
- [TextMate](https://macromates.com/) - A graphical text editor for OS X. ([Source Code](https://github.com/textmate/textmate/)) `GPL-3.0``C++`
- [Vim](http://www.vim.org) - A highly configurable text editor built to enable efficient editing.
- [Vim](http://www.vim.org) - A highly configurable text editor built to enable efficient editing. ([Source Code](https://github.com/vim/vim)) `Vim``C`
- [VSCodium](https://github.com/VSCodium/vscodium) - An open source cross-platform extensible code editor based on [VS Code by Microsoft](https://code.visualstudio.com/) removing their non-free additions.
- [VSCodium](https://vscodium.com/) - An open source cross-platform extensible code editor based on [VS Code by Microsoft](https://code.visualstudio.com/) removing their non-free additions. ([Source Code](https://github.com/VSCodium/vscodium)) `MIT``TypeScript`
- [BounCA](https://bounca.org/) - A personal SSL Key / Certificate Authority web-based tool for creating self-signed certificates.
- [BounCA](https://bounca.org/) - A personal SSL Key / Certificate Authority web-based tool for creating self-signed certificates. ([Source Code](https://gitlab.com/bounca/bounca/)) `Apache-2.0``Python`
- [easy-rsa](https://github.com/OpenVPN/easy-rsa) - bash script to build and manage a PKI CA.
- [easy-rsa](https://github.com/OpenVPN/easy-rsa) - bash script to build and manage a PKI CA.`GPL-2.0``Shell`
- [Fusion Directory](https://www.fusiondirectory.org) - Improve the Management of the services and the company directory based on OpenLDAP.
- [Fusion Directory](https://www.fusiondirectory.org) - Improve the Management of the services and the company directory based on OpenLDAP. ([Source Code](https://github.com/fusiondirectory/fusiondirectory)) `GPL-2.0``PHP`
- [Indieauth](https://indieauth.com/) - Sign in with your domain name (using the rel-me-auth protocol).
- [Indieauth](https://indieauth.com/) - Sign in with your domain name (using the rel-me-auth protocol). ([Source Code](https://github.com/aaronpk/IndieAuth.com)) `Apache-2.0``Ruby`
- [LDAP Account Manager (LAM)](https://www.ldap-account-manager.org/lamcms/) - Web frontend for managing entries (e.g. users, groups, DHCP settings) stored in an LDAP directory.
- [LDAP Account Manager (LAM)](https://www.ldap-account-manager.org/lamcms/) - Web frontend for managing entries (e.g. users, groups, DHCP settings) stored in an LDAP directory. ([Source Code](https://github.com/LDAPAccountManager/lam/)) `GPL-3.0``PHP`
- [Libravatar](https://www.libravatar.org/) - Libravatar is a service which delivers your avatar (profile picture) to other websites.
- [Libravatar](https://www.libravatar.org/) - Libravatar is a service which delivers your avatar (profile picture) to other websites. ([Source Code](https://git.linux-kernel.at/oliver/ivatar/)) `AGPL-3.0``Python`
- [OpenID Connect](http://openid.net/developers/libraries/) - A Simple Identity layer on top of OAuth 2.0.
- [OpenID Connect](http://openid.net/developers/libraries/) - A Simple Identity layer on top of OAuth 2.0.
- [OSIAM](http://osiam.github.io/) - Secure identity management solution providing REST based services for authentication and authorization.
- [OSIAM](http://osiam.github.io/) - Secure identity management solution providing REST based services for authentication and authorization.
- [Pomerium](https://www.pomerium.io/) - An identity and context aware access-proxy inspired by BeyondCorp.
- [Pomerium](https://www.pomerium.io/) - An identity and context aware access-proxy inspired by BeyondCorp. ([Source Code](https://github.com/pomerium/pomerium)) `Apache-2.0``Docker/Go`
- [Samba](https://www.samba.org/) – Active Directory and CIFS protocol implementation.
- [Samba](https://www.samba.org/) – Active Directory and CIFS protocol implementation. ([Source Code](https://download.samba.org/pub/samba/)) `GPL-3.0``C`
- [Smallstep Certificates](https://smallstep.com/certificates/) - A private certificate authority (X.509 & SSH) and related tools for secure automated certificate management.
- [Smallstep Certificates](https://smallstep.com/certificates/) - A private certificate authority (X.509 & SSH) and related tools for secure automated certificate management. ([Source Code](https://github.com/smallstep/certificates)) `Apache-2.0``Go`
- [ZITADEL](https://github.com/caos/zitadel) - Cloud-native Identity & Access Management solution providing a platform for secure authentication, authorization and identity management.
- [ZITADEL](https://zitadel.com/) - Cloud-native Identity & Access Management solution providing a platform for secure authentication, authorization and identity management. ([Source Code](https://github.com/zitadel/zitadel)) `Apache-2.0``Go/Docker/K8S`
- [DadaMail](http://dadamailproject.com/) - Mailing List Manager, written in Perl.
- [DadaMail](http://dadamailproject.com/) - Mailing List Manager, written in Perl. ([Source Code](https://sourceforge.net/projects/dadamail/files/)) `GPL-2.0``Perl`
- [Lewsnetter](https://github.com/bborn/lewsnetter) - E-mail marketing application (create and send e-mail newsletter via SES). Includes subscription management, delivery, bounce and complaint notification, templates, and some stats.
- [Lewsnetter](https://github.com/bborn/lewsnetter) - E-mail marketing application (create and send e-mail newsletter via SES). Includes subscription management, delivery, bounce and complaint notification, templates, and some stats.
- [LibreMailer](https://github.com/averna-syd/LibreMailer) - Libre Mailer is a modest and simple web based email marketing application.
- [LibreMailer](https://github.com/averna-syd/LibreMailer) - Libre Mailer is a modest and simple web based email marketing application.
- [phpList](https://www.phplist.com/) - Newsletter manager written in PHP.
- [phpList](https://www.phplist.com/) - Newsletter manager written in PHP.
- [Remmina](https://www.remmina.org/) - Feature-rich remote desktop application for linux and other unixes. ([Source Code](https://gitlab.com/Remmina/Remmina))
- [Remmina](https://www.remmina.org/) - Feature-rich remote desktop application for linux and other unixes. ([Source Code](https://gitlab.com/Remmina/Remmina))`GPL-2.0``C`
- [X2go](https://wiki.x2go.org/doku.php) - X2Go is an open source remote desktop software for Linux that uses the NoMachine/NX technology protocol. ([Source Code](https://code.x2go.org/gitweb))
- [X2go](https://wiki.x2go.org/doku.php) - X2Go is an open source remote desktop software for Linux that uses the NoMachine/NX technology protocol. ([Source Code](https://code.x2go.org/gitweb))`GPL-2.0``Perl`
- [grml](https://grml.org) – bootable Debian Live CD with powerful CLI tools.
- [grml](https://grml.org) – bootable Debian Live CD with powerful CLI tools. ([Source Code](https://github.com/grml/)) `GPL-3.0``Shell`
- [mitmproxy](http://mitmproxy.org/) - A Python tool used for intercepting, viewing and modifying network traffic. Invaluable in troubleshooting certain problems.
- [mitmproxy](http://mitmproxy.org/) - A Python tool used for intercepting, viewing and modifying network traffic. Invaluable in troubleshooting certain problems. ([Source Code](https://github.com/mitmproxy/mitmproxy)) `MIT``Python`
- [mtr](https://www.bitwizard.nl/mtr/) - Network utility that combines traceroute and ping.
- [mtr](https://www.bitwizard.nl/mtr/) - Network utility that combines traceroute and ping. ([Source Code](https://github.com/traviscross/mtr)) `GPL-2.0``C`
- [perf-tools](https://github.com/brendangregg/perf-tools) - Performance analysis tools based on Linux perf_events (aka perf) and ftrace.
- [perf-tools](https://github.com/brendangregg/perf-tools) - Performance analysis tools based on Linux perf_events (aka perf) and ftrace.`GPL-2.0``Shell`
- [Sysdig](http://www.sysdig.org/) - Capture system state and activity from a running Linux instance, then save, filter and analyze.
- [Sysdig](http://www.sysdig.org/) - Capture system state and activity from a running Linux instance, then save, filter and analyze. ([Source Code](https://github.com/draios/sysdig)) `Apache-2.0``Docker/Lua/C`
- [Wireshark](https://www.wireshark.org/) - The world's foremost network protocol analyzer.
- [ConVirt](http://www.convirture.com/products_opensource.php) - Provides the core functionality for centrally managing your KVM or Xen virtualized environment.
- [ConVirt](http://www.convirture.com/products_opensource.php) - Provides the core functionality for centrally managing your KVM or Xen virtualized environment.
- [Ganeti](http://www.ganeti.org/) - Cluster virtual server management software tool built on top of KVM and Xen.
- [Ganeti](http://www.ganeti.org/) - Cluster virtual server management software tool built on top of KVM and Xen. ([Source Code](https://github.com/ganeti/ganeti)) `BSD-2-Clause``Python/Haskell`
- [KVM](http://www.linux-kvm.org) - Linux kernel virtualization infrastructure.
- [KVM](http://www.linux-kvm.org) - Linux kernel virtualization infrastructure. ([Source Code](https://git.kernel.org/pub/scm/virt/kvm/kvm.git/)) `GPL-2.0/LGPL-2.0``C`
- [OpenNebula](http://opennebula.org/) - Flexible enterprise cloud made simple.
- [OpenNebula](http://opennebula.org/) - Flexible enterprise cloud made simple.
- [Packer](https://www.packer.io/) - A tool for creating identical machine images for multiple platforms from a single source configuration.
- [Packer](https://www.packer.io/) - A tool for creating identical machine images for multiple platforms from a single source configuration. ([Source Code](https://github.com/hashicorp/packer)) `MPL-2.0``Go`
- [QEMU](http://www.qemu.org/) - QEMU is a generic machine emulator and virtualizer.
- [QEMU](http://www.qemu.org/) - QEMU is a generic machine emulator and virtualizer. ([Source Code](https://gitlab.com/qemu-project/qemu)) `LGPL-2.1``C`
- [Vagrant](https://www.vagrantup.com/) - Tool for building complete development environments.
- [Vagrant](https://www.vagrantup.com/) - Tool for building complete development environments. ([Source Code](https://github.com/hashicorp/vagrant)) `BUSL-1.1``Ruby`
- [VirtualBox](https://www.virtualbox.org/) - Virtualization product from Oracle Corporation.
- [Dockovpn](https://dockovpn.io) - Out-of-the-box stateless dockerized OpenVPN server which starts in less than 2 seconds.
- [Dockovpn](https://dockovpn.io) - Out-of-the-box stateless dockerized OpenVPN server which starts in less than 2 seconds. ([Source Code](https://github.com/dockovpn/dockovpn)) `GPL-2.0``Docker`
- [Firezone](https://www.firez.one/) - WireGuard based VPN Server and Firewall.
- [Firezone](https://www.firez.one/) - WireGuard based VPN Server and Firewall. ([Source Code](https://github.com/firezone/firezone)) `Apache-2.0``Docker`
- [Headscale](https://github.com/juanfont/headscale) - Self-hostable fork of [Tailscale](https://tailscale.com), cross-platform clients, simple to use, built-in (currently experimental) monitoring tools.
- [Headscale](https://github.com/juanfont/headscale) - Self-hostable fork of [Tailscale](https://tailscale.com), cross-platform clients, simple to use, built-in (currently experimental) monitoring tools. `BSD-3-Clause``Go`
- [Nebula](https://github.com/slackhq/nebula) - A scalable p2p VPN with a focus on performance, simplicity and security.
- [Nebula](https://github.com/slackhq/nebula) - A scalable p2p VPN with a focus on performance, simplicity and security.`MIT``Go`
- [ocserv](http://www.infradead.org/ocserv/) - Cisco AnyConnect-compatible VPN server
- [ocserv](http://www.infradead.org/ocserv/) - Cisco AnyConnect-compatible VPN server ([Source Code](https://gitlab.com/ocserv/ocserv)) `GPL-2.0``C`
- [OpenVPN](https://community.openvpn.net) - Uses a custom security protocol that utilizes SSL/TLS for key exchange.
- [OpenVPN](https://community.openvpn.net) - Uses a custom security protocol that utilizes SSL/TLS for key exchange. ([Source Code](https://github.com/OpenVPN/openvpn)) `GPL-2.0``C`
- [PiVPN](https://www.pivpn.io/) - The simplest way to setup and manage a VPN, designed for Raspberry Pi. ([Source Code](https://github.com/pivpn/pivpn)) `MIT``Shell`
- [PiVPN](https://www.pivpn.io/) - The simplest way to setup and manage a VPN, designed for Raspberry Pi. ([Source Code](https://github.com/pivpn/pivpn)) `MIT``Shell`
- [Pritunl](http://pritunl.com/) - OpenVPN based solution. Easy to set up.
- [Pritunl](http://pritunl.com/) - OpenVPN based solution. Easy to set up.
- [SoftEther](https://www.softether.org/) - Multi-protocol software VPN with advanced features
- [SoftEther](https://www.softether.org/) - Multi-protocol software VPN with advanced features ([Source Code](https://github.com/SoftEtherVPN/SoftEtherVPN/)) `Apache-2.0``C`