Open Sound System: Device Node, POSIX, Unix Like, Free Software Licences,

XMMS: Free Software, Audio Player (Software), Winamp, Unix Like, Operating System

Unix Time: Coordinated Universal Time, Like, Unix, Leap Seconds, ISO 8601, Network...

Unix Amiga Delitracker Emulator: Open Source, Free Software, Emulator

GNU Hurd: Free software, Unix like, Unix, Kernel (computing), General Public License,...