OBJ3 is a program specification and proof system based on order sorted equational logic. It has been successfully used for research and teaching in software design and specification, rapid prototyping, theorem proving, user interface design, and hardware verification, among other things. It was the first language to implement parameterized programming and its module system influenced the designs of the Ada, C++, and ML module systems.
OOMPI is an object-oriented interface to the MPI message passing library standard. It is used at a much higher level than the standard MPI C++ bindings, providing a full class library that takes advantage of many C++/object oriented abstractions for message passing. It is a thin layer that runs over any MPI-1.1 compliant C implementation.
Obsequqiuem is a network-based streaming MP3 jukebox that uses RTP/Multicast (RFC 2250) or Icecast to stream the MP3s. The Web interface allows local and remote users to control what music is being streamed by the server, and includes support for browsing the music collection, playlist mangement, multiple channel support, and an automatic music selection mechanism called DJ Random. The package also includes scripts to do one step ripping, encoding, and submission into the database. The server allows remote MP3 check-in/check-out and a supplied script allows downloading a playlist from the server into a Rio player.
Obsidian is an extensible virtual world system with a fullblown multiplayer client-server architecture. It is not a VRML2 world system, though there are plans to include VRML2 as a world data format. Note that active development on this system stopped a while ago, though the code is still available for the curious. The code may not even compile on current Linux or Irix systems.
ocicpplib is a C++ library to communicate with Oracle RDBMS through OCI. It features a JDBC-like interface to Oracle. The goal of the OCI C++ Library is to provide a simple interface to Oracle. It features support for Oracle 8 and 8i, BLOB/CLOB support, ROWID, REFCursor's and Nested Tables.
The Easysoft ODBC-ODBC Bridge allows applications on one machine to access ODBC data sources on another. It supports multiple concurrent connections from multiple clients to multiple target databases. The principle application is to enable access from Linux and Unix platforms to remote ODBC databases. For example, Apache/PHP programs on Linux can read/write data held on MS SQL Server on Windows, and Perl programs can read/write data held in a MS Access database. Supported applications include Applixware, Open Office, Python, Rexx/SQL, mnGoSearch, OpenLDAP, and Oracle sqlplus. Supported platforms include Linux, MacOSX, IBM zSeries, Windows and various Unix flavors.
oDns is a simple php/Perl/MySQL frontend to the BIND 8.2.1 Name Server. All the hosts information is saved in four SQL tables. The php-based Web frontend allows you to add/edit/remove domains (primary and slaves) and contact information. In the background, Perl is used to generate standard named.conf and specific zone files for all the primary domains.
oftpd is designed to be as secure as an anonymous FTP server can possibly be. It runs as non-root for most of the time, and uses the Unix chroot() command to hide most of the systems directories from external users--they cannot change into them even if the server is totally compromised. It also contains its own directory-change and directory-listing code (most FTP servers execute the system "ls" command to list files).
The Open Hardware Certification Program (OHCP) Test Suite is a collection of tests to verify the compatibility of your hardware with Open Source operating systems. Tests have been contributed by multiple authors and organizations, and are bundled with documentation, test procedures, and some automation scripts to help run the tests.