Letter: O
- ogmrip - DVD ripping and encoding graphical user interface
- omnibook - Common files for omnibook-kmod
- omnibook-kmod - Kernel module for HP Omnibook/Pavillon, Toshiba Satellite and Compal laptops
- open-vm-tools - VMware Guest OS Tools
- open-vm-tools-kmod - VMware Tools Kernel Modules
- opencore-amr - OpenCORE Adaptive Multi Rate Narrowband and Wideband speech lib
- osmose - A Sega Master System / Game Gear emulator