Audio Tag Editor
GUI to work with abc notation
View and edit DICOM tags (Windows & Mac & Linux)
Shotcut is a free, open source, cross-platform video editor.
An Audio/MIDI multi-track sequencer
Graphical editor software for many Boss and Roland effect & synth unit
Generate Harmonious Colors Freely.
Free professional video converter Windows|Mac|Linux
Qt XG Editor
it's a video player, also works for music and pictures
LDraw™ editor for LEGO® style digital building instructions.
show and edit eulumdat files
Sound Editor for KDE
Video editor for video stabilization
GOP-based video editor (remuxer)
Cross-platform graphic raster editor
image editor
Qt Visual Graph Editor
Tool to edit and preview Qt style sheets (QSS)
Music score editor