A LinuxSampler Qt GUI Interface
Easy-to-use print report library and designer
Guitare rosette design
QDVDAuthor is a GUI frontend for dvdauthor. Video DVD creator
Qt4 MPD Client
GYD is a youtube-dl GUI based on QT
Sort and copy mp3 files to USB stick
A graphical interface GUI for Fluidsynth Soundfont Player
Photo browser with impressive 3D effects, slide effects and animations
Meego Harmattan mplayer GUI frontend
Easy to use physics simulation combining ODE with OpenInventor.
XMMS2 client writen with Qt4.