Linux apps that run anywhere. Download an application, make it executable, and run! No need to install. Distribute your desktop Linux application in the AppImage format and win users running all common Linux distributions. Package once and run everywhere. Reach users on all major desktop distributions. http://appimage.org/
GammaRay is a tool to poke around in a Qt-application and also to manipulate the application to some extent.
Geany is a small and lightweight Integrated Development Environment. It was developed to provide a small and fast IDE. Another goal was to be as independent as possible from a KDE or GNOME - Geany only requires the GTK3 runtime libraries.
Google Earth lets you fly anywhere on Earth to view satellite imagery, maps, terrain, 3D buildings, from galaxies in outer space to the canyons of the ocean. Note that this repository does NOT contain a readymade Google Earth Appimage due to legal reasons, but a script that allows you to generate your own.
Gqrx is an open source software defined radio receiver (SDR) powered by the GNU Radio and the Qt graphical toolkit. Gqrx supports many of the SDR hardware available, including Airspy, Funcube Dongles, rtl-sdr, HackRF and USRP devices.