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
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)
Real Time Electronic Circuit Simulator.
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
General purpose tile map editor
ShelXle is a Qt GUI for SHELXL
SCADA HMI for substations, IoT and automation applications
LDraw™ editor for LEGO® style digital building instructions.