ISPmanager!

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.

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

The cPanel and WHM software package makes life easier for web hosts and the website owners they serve. It offers easy-to-use, powerful tools that perform essential tasks quickly, easily, and reliably.

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

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.

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.

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.

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.

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

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

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.

DirectAdmin is the easiest to use control panel. DirectAdmin is programmed to be the fastest running control panel available. DirectAdmin avoids downtime by automatically recovering from crashes. We offer lightning-fast support by phone, e-mail, forum, and live online chat. We offer flexible licensing options to suit every kind of hosting company.

Internet Multi Server Control Panel (i-MSCP) is a project founded to build an impressive and powerful opensource Multi Server Control panel for personal and professional usage. It must allow to manage any shared hosting environment in an easy way without any human intervention on the servers file system.

Ehcp is a Hosting Control Panel (hcp).hcp is a tool in a server to facilate the process of hosting domains, emails, adding domains, ftp users and so on.