Letter: O
- ogmrip - DVD ripping and encoding graphical user interface
- omnibook - Common files for omnibook-kmod
- openafs - Enterprise Network File System
- openafs-kmod - Kernel module(s)
- opencore-amr - OpenCORE Adaptive Multi Rate Narrowband and Wideband speech lib
- openshot - A GTK based non-linear video editor
- osmose - A Sega Master System / Game Gear emulator