Name: QtSixA
Homepage: http://qtsixa.sourceforge.net/
Why: There's no way to properly set up DualShock 3 (playstation 3) controllers on Solus.
Open Source? Yes, GPLv2
Link to Source tarball: http://heanet.dl.sourceforge.net/project/qtsixa/QtSixA%201.5.1/QtSixA-1.5.1-src.tar.gz
(I know, SourceForge...)
Bonus: Line 1 on the makefile
#You know, there are pre-compile DEBs of this...
Edit: Changed source tarball URL. Thanks Shadow53 for pointing that out