Debian

Debian GNU/Linux is an operating system. I run it since 2008.
Debian GNU/Linux is free and open source.

Free Software Free Software Foundation

The Free Software Foundation (FSF) is a non-profit organization founded by Richard Matthew Stallman. He gives the free software definition:

"A program is free software if the program's users have the four essential freedoms:

The freedom to run the program as you wish, for any purpose (freedom 0).
The freedom to study how the program works, and change it so it does your computing as you wish (freedom 1). Access to the source code is a precondition for this.
The freedom to redistribute copies so you can help others (freedom 2).
The freedom to distribute copies of your modified versions to others (freedom 3). By doing this you can give the whole community a chance to benefit from your changes. Access to the source code is a precondition for this."

GNU is a collection of free software. It respects users' freedom.

Linux is a free operating system kernel created by Linus Torvalds.

Toile Libre can host websites, mails and other services. It only uses free software. I use their services since 2009. The cost is what-you-want.