- [libcamera](https://git.linuxtv.org/libcamera.git/), a library to handle complex cameras on Linux, ChromeOS and Android
- [Libdrm](https://gitlab.freedesktop.org/mesa/drm), a library for abstracting DRM kernel interfaces
- [libdwarf](https://www.prevanders.net/dwarf.html), a multiplatform DWARF parser library
- [libeconf](https://github.com/openSUSE/libeconf), Enhanced config file parsing library, which merges config files placed in several locations into one
- [Libepoxy](https://github.com/anholt/libepoxy/), a library for handling OpenGL function pointer management
- [libfuse](https://github.com/libfuse/libfuse), the reference implementation of the Linux FUSE (Filesystem in Userspace) interface
@ -158,6 +161,7 @@ format files
- [szl](https://github.com/dimkr/szl), a lightweight, embeddable scripting language
- [Taisei Project](https://taisei-project.org/), an open-source Touhou Project clone and fangame
- [Terminology](https://github.com/billiob/terminology), a terminal emulator based on the Enlightenment Foundation Libraries
- [ThorVG](https://www.thorvg.org/), vector-based scenes and animations library
- [Tilix](https://github.com/gnunn1/tilix), a tiling terminal emulator for Linux using GTK+ 3
- [Tizonia](https://github.com/tizonia/tizonia-openmax-il), a command-line cloud music player for Linux with support for Spotify, Google Play Music, YouTube, SoundCloud, TuneIn, Plex servers and Chromecast devices
- [Trilobite XUnit Test](https://github.com/trilobite-stdlib/trilo-xtest-c), a framework for testing C code