Audio Tag Editor
A free, open source, multi-platform SQLite database manager
Open source PDF editor
An integrated writing environment for creating LaTeX documents
Flexible level editor
Open source plain text editor designed for writing novels
C++ Qt ORM (Object Relational Mapping) and ODM library
GUI to work with abc notation
Shotcut is a free, open source, cross-platform video editor.
View and edit DICOM tags (Windows & Mac & Linux)
Cross-platform text and code editor
Real Time Electronic Circuit Simulator.
Python Development Environment with all batteries included
An Audio/MIDI multi-track sequencer
Graphical editor software for many Boss and Roland effect & synth unit
2D molecule editor
Final Fantasy VIII Save Editor
Simple XML editor and XSD viewer
Qt based Veroboard, Perfboard, and PCB layout and routing application
Final Fantasy 7 Save Editor
General purpose tile map editor