Letter: O
- ORBit-0.5.17-15.2.2: A high-performance CORBA Object Request Broker.
- ORBit2-2.14.3-3.al3: A high-performance CORBA Object Request Broker
- OpenIPMI-2.0.6-5: OpenIPMI (Intelligent Platform Management Interface) library and tools
- oaf-0.6.10-12.3: Object activation framework for GNOME.
- opal-2.2.2-1.1: Open Phone Abstraction Library
- open-1.4-25: A tool which will start a program on a virtual console.
- openais-0.80.1-3.al3.1: The openais Standards-Based Cluster Framework executive and APIs
- openjade-1.3.2-27: A DSSSL implementation.
- openldap-2.3.27-4: The configuration files, libraries, and documentation for OpenLDAP.
- openmotif-2.3.0-0.2.1: Open Motif runtime libraries and executables.
- openmpi-1.1-7.al3.1: Open Message Passing Interface
- openobex-1.3-3.1: Library for using OBEX
- openobex-apps-1.0.0-10: Applications for using OBEX
- opensp-1.5.2-3.1: SGML and XML parser
- openssh-4.3p2-10: The OpenSSH implementation of SSH protocol versions 1 and 2
- openssl-0.9.8b-8.2: The OpenSSL toolkit
- openssl097a-0.9.7a-9: The OpenSSL toolkit
- openswan-2.4.5-2.1: Openswan IPSEC implementation
- oprofile-0.9.1-12.1.1: System wide profiler
- orca-1.0.0-4.al3: Flexible, extensible, and powerful assistive technology
- oro-2.0.8-1jpp_4fc: Full regular expressions API