Jason - Infinitely hackable mobile client
PhotoFlare - Quick, simple but powerful Cross Platform image editor.
Kamon.io - Kamon makes an instrumentation library and Application Performance Monitoring tool that helps developers find and fix performance issues in microservices. Works best for Scala (Akka, Play, Lagom) and Java.
showFoto - ShowFoto is the standalone image editor of the digiKam project.
WorkForce Software - WorkForce Software provides workforce management solutions for organizations with complex policies and compliance concerns.
PhotoDemon - Lightweight portable BSD licensed photo editor for Windows focused on performance and usability.