There are many distributions containing Linux. I have used Red Hat, OpenSuSE and Ubuntu. I prefer Xubuntu for desktops, but use others for specific projects, e.g. Kali.
This will get you started
13 Best Linux Desktop Environment for Ubuntu: Which One is Right for You?
Linux is a versatile and customizable open source operating system. You can make the Linux distros as per your requirement. Ubuntu is one of the best Linux distro out there which comes pre-packed with unity desktop environment, Ubuntu Gnome, Ubuntu MATE, Ubuntu cinnamon etc.
Readerware - Music, Video & Book Database Software
Internet software for collectors, schools, libraries, churches. The easiest, fastest way to catalog your books, music and videos. Nothing else comes close.
Kodi | Open Source Home Theater Software
Kodi is a free media player that is designed to look great on your big screen TV but is just as home on a small screen.