Letter: O
- ORBit - CORBA Object Request Broker for GNOME-1 compatibility
- ORBit-devel - Development libraries, header files and utilities for ORBit
- OpenEXR - A high dynamic-range (HDR) image file format
- OpenEXR-devel - Headers and libraries for building apps that use OpenEXR
- OpenSceneGraph - High performance real-time graphics toolkit
- OpenSceneGraph-devel - Devel files for OpenSceneGraph
- OpenSceneGraph-examples - Sample applications for OpenSceneGraph
- OpenThreads - OpenThreads
- OpenThreads-devel - Devel files for OpenThreads
- obby - A library which provides synced document buffers
- obby-devel - Development libraries for obby
- obconf - A graphical configuration editor for the Openbox window manager
- obexftp - Tool to access devices via the OBEX protocol
- obexftp-devel - Header files and libraries for obexftp
- obmenu - A graphical menu editor for Openbox
- ocaml - Objective Caml compiler and programming environment
- ocaml-SDL - OCaml bindings for SDL
- ocaml-SDL-devel - Development files for ocamlSDL
- ocaml-camlimages - OCaml image processing library
- ocaml-camlimages-devel - Development files for camlimages
- ocaml-docs - Documentation for OCaml
- ocaml-emacs - Emacs mode for Objective Caml
- ocaml-ocamldoc - Documentation generator for OCaml
- ochusha - A GTK+ 2ch.net BBS Browser
- ocsinventory-client - Open Computer and Software Inventory Next Generation client
- ocsinventory-ipdiscover - Open Computer and Software Inventory Next Generation client
- octave - A high-level language for numerical computations
- octave-devel - Development headers and files for Octave
- octave-forge - Contributed functions for octave
- oddjob - A D-BUS service which runs odd jobs on behalf of client applications
- oddjob-devel - Files for developing oddjob clients
- oddjob-libs - Libraries used by oddjob clients
- ode - High performance library for simulating rigid body dynamics
- ode-devel - Development files for ode
- offlineimap - Powerful IMAP/Maildir synchronization and reader support
- ogdi - Open Geographic Datastore Interface
- ogdi-devel - OGDI header files and documentation
- ogdi-odbc - ODBC driver for OGDI
- ogdi-tcl - TCL wrapper for OGDI
- ogre - Object-Oriented Graphics Rendering Engine
- ogre-devel - Ogre header files and documentation
- ogre-devel-doc - Ogre development documentation
- ogre-samples - Ogre samples executables and media
- oidentd - Implementation of the RFC1413 identification server
- ois - Open Input System, OO gaming input library
- ois-devel - Development files for ois
- oki4linux - OKIPAGE (4w, 4w Plus, 6w, 8w, 8w Lite, 8z), OL400w printer driver
- olive - Graphical frontend to the bazaar revision control system
- oneko - Cat chases the cursor
- onesixtyone - An efficient SNMP scanner
- ooo2txt - Convert OpenOffice documents to simple text
- oooqs2 - OpenOffice.org Quickstarter 2
- openal - Open Audio Library
- openal-devel - Development files for openal library
- openalpp - Object Oriented version of OpenAL
- openalpp-devel - Development files for openalpp
- openarena - Open source first person shooter
- openarena-data - Data files for openarena
- openbabel - Chemistry software file format converter
- openbabel-devel - Development tools for programs which will use the Open Babel library
- openbabel-perl - Perl wrapper for the Open Babel library
- openbabel-python - Python wrapper for the Open Babel library
- openbox - A highly configurable and standards-compliant X11 window manager
- openbox-devel - Development files for openbox
- opencdk - Provides basic parts of the OpenPGP message format
- opencdk-devel - Files which are needed to develop applications using opencdk
- openct - Middleware framework for smart card terminals
- openct-devel - OpenCT development files
- opencv - Collection of algorithms for computer vision
- opencv-devel - Development files for using the OpenCV library
- opencv-python - Python bindings for apps which use OpenCV
- openlierox - Addictive realtime multiplayer 2D shoot-em-up
- openmsx - An emulator for the MSX home computer system
- openoffice.org-dict-cs_CZ - Czech spellchecker and hyphenation dictionaries for OpenOffice.org
- openpbx - The Truly Open Source PBX
- openpbx-alsa - ALSA channel driver for OpenPBX
- openpbx-bluetooth - Bluetooth channel driver for OpenPBX
- openpbx-capi - CAPI channel driver for OpenPBX
- openpbx-devel - Development package for openpbx
- openpbx-jabber - Jabber support for OpenPBX
- openpbx-javascript - JavaScript support for OpenPBX
- openpbx-ldap - LDAP support for OpenPBX
- openpbx-misdn - mISDN channel driver for OpenPBX
- openpbx-mysql - MySQL support for OpenPBX
- openpbx-odbc - ODBC support for OpenPBX
- openpbx-ogi - OpenPBX Gateway Interface
- openpbx-postgresql - PostgreSQL support for OpenPBX
- openpbx-zaptel - Zaptel modules for OpenPBX
- opensc - Smart card library and applications
- opensc-devel - OpenSC development files
- openslp - Open implementation of Service Location Protocol V2
- openslp-devel - OpenSLP headers and libraries
- openslp-server - OpenSLP server daemon
- openvpn - A full-featured SSL VPN solution
- openvrml - VRML/X3D runtime library
- openvrml-devel - Headers for developing C++ programs with OpenVRML
- openvrml-gl - OpenGL renderer for OpenVRML
- openvrml-gl-devel - OpenVRML OpenGL renderer headers
- openvrml-mozilla-plugin - VRML/X3D browser plug-in for Mozilla-based browsers
- openvrml-player - VRML/X3D player
- openvrml-xembed - VRML/X3D browser XEmbed component for embedding in X11 applications
- optipng - A PNG optimizer and converter
- orage - Time-managing application for Xfce4
- orange - Squeeze out installable Microsoft cabinet files
- orange-devel - Files needed for software development with orange
- orpie - A fullscreen console-based RPN calculator
- ortp - A C library implementing the RTP protocol (RFC3550)
- ortp-devel - Development libraries for ortp
- osgal - Adapts OpenSceneGraph to use OpenAL++
- osgal-devel - Library development files for osgal
- osgcal - Adapts OpenSceneGraph to use Cal3D
- osgcal-devel - Library development files for osgCal
- osiv - Open Source Image Velocimetry
- otrs - The Open Ticket Request System
- ots - A text summarizer
- ots-devel - Libraries and include files for developing with libots.
- overgod - Another Asteroid like game
- oxine - Lightweight, purely OSD based xine frontend