cPanel!

Webmin is a web-based system configuration tool for Unix-like systems, although recent versions can also be installed and run on Windows. With it, it is possible to configure operating system internals, such as users, disk quotas, services or configuration files, as well as modify and control open source apps, such as the Apache HTTP Server, PHP or MySQL.

Vesta Control Panel is an open source web hosting control panel with premium features, minimalistic, safe and light

ISPmanager is one of the leading web server control panels on the market. The control panel allows you to manage your entire web-server through a user friendly and comprehensive multi-language web interface. With the click of a mouse you can manage users, hosting packages, mail boxes, databases and much more from one centralized location in a simple and intuitive way.

Web-based Linux server administration panel.Works best for VPS and dedicated servers.Runs on Debian, Ubuntu, RHEL and CentOS.

Free CentOS Linux Web Hosting control panel designed for quick and easy management of (Dedicated & VPS) servers without of need to use ssh console for every little thing

Sentora is an open-source web hosting control panel built specifically to work on a variety of Linux distributions. Sentora is licensed under the GPL and is a separately maintained fork of the original ZPanel project.

ISPConfig 3 is an open source hosting control panel for Linux. ISPconfig 3 is capable of managing multiple servers from one control panel. ISPConfig is licensed under BSD license.

Cloudron is a platform that makes it easy to run and maintain web apps on your server. Unlike 1-click solutions that do not assist you with any tasks post installation and require knowledge of system administration (like installing certificates, creating databases, having a backup/restore strategy), Cloudron provides a complete integrated solution for app and user management.

Kloxo-MR Features

ServerPilot makes it easy to host WordPress and any other PHP sites on DigitalOcean, Linode, Rackspace, Vultr, and other cloud providers. By turning any server into an optimized PHP and WordPress hosting platform, ServerPilot makes it simple to run your sites in the best way possible: on cloud servers.

Froxlor: The server administration software for your needs.Developed by experienced server administrators this open source (GPL) panel simplifies the effort of managing your hosting platform.

Virtualmin produces software to enable cloud computing and virtual web hosting for hosting providers, enterprise, and web application developers.

ZPanel is a free and complete web hosting control panel for Microsoft Windows and POSIX (Linux, UNIX and MacOSX) based servers. ZPanel is written in PHP and uses several open-source (or freely available) software packages to provide a secure, web hosting system. Learn more...

Atomia DNS is a free, open source DNS management system. It is easy to use, reliable, scalable and production ready.

AlternC is a set of software management on Linux shared hosting, easy to use, easy to install, based solely on software Opensource AlternC being under the GPL .