- K-Scale Open-source humanoid robots, built for developers.
- Krita is a FREE and open source painting program. It is made by artists that want to see affordable art tools for everyone.
- KDE Connect enables communication between all your devices. Soduto is an open-source KDEConnect compatible client for macOS.
- Kener is a Open-Source Status Page System.
- Keyboard Connect is video conferencing for piano tutors. Step up your remote lessons by giving students a focused, engaging experience.
- Kicks Pro ($49.99) is a clutter-free, powerful Mac-native sample manager.