Geonkick is a free software synthesizer capable of generating a wide range of percussive sounds, including kicks, snares, claps, hi-hats, shakers, and also unique effect sounds.

Download basic version (1 instrument, 1 layer per instrument, no waveform zoom)
GNU/Linux binaries (basic v3.7.0)
Windows installer (basic v3.7.0)
Buy the full, ready-to-run version (16 instruments, 3 layers per instrument, all other features)
You can find Geonkick in the official repositories of popular GNU/Linux distributions such as ArchLinux, OpenSUSE, Fedora, Manjaro, FreeBSD, KXStudio, Ubuntu Studio, and more.
Here you can find the codebase to build Geonkick. For better stability and reliability, it is recommended to build only from release tags.
If you need to report an issue, suggest a feature, or provide feedback, here are the ways to do it:
Here you can find the Geonkick User Guide. It is released under CC0 1.0 Universal (CC0 1.0) Public Domain Dedication.
Download:
How to build and install Geonkick, please see the README.md file in the corresponding version's source code.