The OpenShot audio library is a program which allows high-quality editing and playback of audio based on the JUCE library.

MUMPS implements a direct solver for large sparse linear systems, with a particular focus on symmetric positive definite matrices. It can operate on distributed matrices e.g. over a cluster. It has Fortran and C interfaces, and can interface with ordering tools such as Scotch.

cimfomfa supplies abstractions for memory management, I/O, associative arrays, strings, heaps, and a few other things. It is used by both MCL, a cluster algorithm for graphs, and zoem, a macro/DSL language. The tingea library comes with some testing programs.

Library for handling SDL (Simple DirectMedia Layer) video data. Implements input and output blocks. Part of the main gnuradio build.

The gnuradio interface to the UHD library to connect to and send and receive data between to the Ettus Research, LLC product line - including the USRP family of software radio peripheral devices. Part of the main gnuradio build.

PgSphere, an extension for PostgreSQL, aims at providing uniform access to spherical data. It allows for a fast search and analysis for objects with spherical attributes in geographical, astronomical, or other applications using PostgreSQL.