SQLite is a C library that implements an SQL database engine. Programs that link with the SQLite library can have SQL database access without running a separate RDBMS process.

Symphonic is a file manager for Sony's flash players (such as the NW-E00x series), where songs are stored in a proprietary format not very Unix-friendly.

ejabberd is a Jabber/XMPP + MQTT + SIP server written in Erlang, featuring: * distributed operation with load-balancing across a cluster; * fault-tolerant database replication and storage on multiple nodes, allowing nodes to be added or replaced "on the fly"; * virtual hosting (several virtual domains can be served using a single ejabberd instance); * XMPP compliance; * MQTT 5 compliance; * SIP service; * web-based administration; * SSL/TLS support; * conferencing via Multi-User Chat; * Jabber Users Directory, based on users' vCards; * service discovery; * shared roster.

PyDev is a Python IDE for Eclipse, which may be used in Python, Jython and IronPython development.

Fluidsynth is a real-time midi synthesizer based on the soundfont (sf2 and sf3) specifications. It can be used to render MIDI input or MIDI files to audio. The MIDI events are read from a MIDI device. The sound is rendered in real-time to the sound output device.