Free software that provides a graphical interface for the powerful command line utility ExifTool.
Open-source tool aimed at image processing, offering a wide variety of filters and effects.
Image compression software that reduces file size without compromising visual quality.
Android application that lets you add the "Thug life" effect to your photos.

Shows hexadecimal color codes and has many features.
Software for viewing, converting and printing that works with 2D DWG, DXF, 3D STEP file formats and VariCAD 2D and 3D files.