Photo/Video/GIF enlargement using machine learning
ksnip the cross-platform screenshot and annotation tool
3D Without Boundaries
Powerful desktop publishing software
Hewlett-Packard's Linux imaging and printing software
FlightGear Flight Simulator: free open-source multiplatform flight sim
Swiss army knife of image processing
Panorama photo stitcher
GPS log file viewer and analyzer
a parametric 3D CAD modeler
2D & 3D TeX-Aware Vector Graphics Language
3D Engine c++
3D fractal rendering software
Display, convert, and edit raster image and vector image files
Qt based cross-platform screenshot tool with annotations
LDraw™ editor for LEGO® style digital building instructions.