YunoHost is an operating system aiming for the simplest administration of a server, and therefore democratize self-hosting, while making sure it stays reliable, secure, ethical and lightweight. Technically, it can be seen as a distribution based on Debian GNU/Linux and can be installed on many kinds of hardware.

• Based on Debian
• Administrate your server through a friendly web interface
• Deploy apps in just a few clicks

See also:

Personal Server at Home

FreedomBox is a private server for non-experts: it lets you install and configure server applications with only a few clicks. It runs on cheap hardware of your choice, uses your internet connection and power, and is under your control.