Mandriva S.A has a long history and an unique track-record when it comes to Free & Open Source Software.
Mandriva contributes code and expertise both to research projects and to major Free and Open Source Software projects:

OpenMandriva
Mageia
KDE
Gnome

 

Mandriva develops Enterprise software that is also Free & Open Source, making it one of the rare
"pure players" in the industry.
Source code and development of Mandriva software is accessible here:

Git repos (including MBS code)
Pulse Development pages
SVN repos
Bugzilla