Letter: O
- ORBit-0.5.17-15.2.2: A high-performance CORBA Object Request Broker.
- ORBit2-2.14.0-1: A high-performance CORBA Object Request Broker.
- OpenEXR-1.2.2-7.ML5: A high dynamic-range (HDR) image file format
- OpenIPMI-1.4.14-19: OpenIPMI (Intelligent Platform Management Interface) library and tools
- oaf-0.6.10-12.3: Object activation framework for GNOME.
- opal-2.2.1-1: Open Phone Abstraction Library
- open-1.4-24.2.1: A tool which will start a program on a virtual console.
- openal-0.0.9-0.5.1.ML5: Open Audio Library
- openct-0.6.6-3: CT-API driver for PC/SC-Lite
- openhpi-2.2.1-4.2: openhpi Hardware Platform Interface (HPI) library and tools
- openjade-1.3.2-23.2: A DSSSL implementation.
- openldap-2.3.19-4: The configuration files, libraries, and documentation for OpenLDAP.
- openmotif-2.3.0-0.1.9.2: Open Motif runtime libraries and executables.
- openobex-1.1-1: Library for using OBEX
- openobex-apps-1.0.0-10: Applications for using OBEX
- openoffice.org-2.0.2-5.7.2: OpenOffice.org comprehensive office suite.
- opensc-0.11.0-1: OpenSC implements the PKCS#11 & PKCS#15 API for smart cards
- opensm-1.0-0.4265.1.ML5.2.1: OpenIB InfiniBand Subnet Manager and management utilities
- opensp-1.5.2-1.2: SGML and XML parser
- openssh-4.3p2-4: The OpenSSH implementation of SSH protocol versions 1 and 2.
- openssl-0.9.8a-5.2: The OpenSSL toolkit.
- openssl097a-0.9.7a-4.2.1: The OpenSSL toolkit.
- openswan-2.4.4-1.1.2.1: Openswan IPSEC implementation
- openvpn-2.1-0.7.beta11.ML5: A full-featured SSL VPN solution
- oprofile-0.9.1-8.1.1: System wide profiler
- oro-2.0.8-1jpp_4.ML5: Full regular expressions API
- ortp-0.8.1-2.ML5: A C library implementing the RTP protocol (RFC3550)
- ots-0.4.2-7: A text summarizer
- ots-0.4.2-7.ML5: A text summarizer