CoreCtrl is a Free and Open Source GNU/Linux application that allows you to control with ease your computer hardware using application profiles. It aims to be flexible, comfortable and accessible to regular users.
Briar
Secure messaging, anywhere.Peer-to-peer encrypted messaging and forums.
samplv1
samplv1 is an old-school all-digital polyphonic sampler synthesizer with stereo fx.
F3D
F3D is a VTK-based 3D viewer following the KISS principle, so it is minimalist, efficient, has no GUI, has simple interaction mechanisms and is fully controllable using arguments in the command line.
Giada
Giada is an open source, minimalistic and hardcore music production tool. Designed for DJs, live performers and electronic musicians.
nruas
Drumstick is a set C++ MIDI libraries using Qt5 objects, idioms and style. It contains a C++ wrapper around the ALSA library sequencer interface; ALSA sequencer provides software support for MIDI technology on Linux. A complementary library provides classes for SMF (Standard MIDI files: .MID/.KAR), Cakewalk (.WRK), and Overture (.OVE) file formats processing.
Pragha
Pragha is a Lightweight Music Player for GNU/Linux, based on Gtk, sqlite, and completely written in C, constructed to be fast, light, and simultaneously tries to be complete without obstructing the daily work. 😉
Yooj YimNote
The simplest way to keep notes
KeePassXC
KeePassXC can store your passwords safely and auto-type them into your everyday websites and applications.
Persepolis
Persepolis is a download manager & a GUI for Aria2.