GIMP

Whether you are a graphic designer, photographer, illustrator, or scientist, GIMP’s tool provides you with sophisticated tools to get your job done. You can further enhance your productivity with GIMP thanks to many customization options and 3rd party plugins.

Audacity

The free and open nature of Audacity has allowed it to become very popular in education, encouraging its developers to make the user interface easier for students and teachers. Support for LADSPA, LV2, Nyquist, VST and Audio Unit effect plug-ins. Effects can be easily modified in a text editor, or you can even write your own plug-in.

Notepad++

Notepad++ has features for consuming and creating cross-platform plain text files. It recognizes three newline representations (CR, CR+LF and LF) and can convert between them on the fly. In addition, it supports reinterpreting plain text files in various character encodings and can convert them to ASCII, UTF-8 or UCS-2. As such, it can fix plain text that seem gibberish only because their character encoding is not properly detected.

Blender

Blender comes with a built-in Video Editor. This allows users to perform basic actions like video cuts and splicing, as well as more complex tasks like video masking. It also has many features including effects like Gaussian Blur, color grading, Fade and Wipe transitions, and other video transformations. The Blender Network provides support and social services for Blender Professionals.

Paint.NET

Paint.NET includes simple tools for drawing shapes, including an easy-to-use curve tool for drawing splines or Bezier curves. The Gradient tool, new for 3.0, has been cited as an innovative improvement over similar tools provided by other software. The facilities for creating and working with selections is powerful, yet still simple enough to be picked up quickly.