Most recent amateur radio transceivers allow external control of their functions through a computer interface. Unfortunately, control commands are not always consistent across a manufacturer's product line and each manufacturer's product line differs greatly from its competitors.

libdbi implements a database-independent abstraction layer in C, similar to the DBI/DBD layer in Perl. Writing one generic set of code, programmers can leverage the power of multiple databases and multiple simultaneous database connections by using this framework.

Rygel is a home media solution that allows you to easily share audio, video and pictures, and control of media player on your home network. In technical terms it is both a UPnP AV MediaServer and MediaRenderer implemented through a plug-in mechanism. Interoperability with other devices in the market is achieved by conformance to very strict requirements of DLNA and on the fly conversion of media to format that client devices are capable of handling.

OPeNDAP provides software that allows you to access data over the internet, from programs that weren't originally designed for that purpose, as well as some that were. While OPeNDAP is the original developer of the Data Access protocol which its software uses, many other groups have adopted DAP and provide compatible clients, servers and software development kits.

General purpose cryptographic library for C++.

heartbeat is a messaging subsystem for high availability which implements serial, UDP, and PPP/UDP heartbeats.