With Type light you can design, edit and convert OpenType TrueType and PostScript fonts. Type light is free for personal and limited commercial use.
Notepad++ is a free (as in "free speech" and also as in "free beer") source code editor and Notepad replacement that supports several languages. Running in the MS Windows environment, its use is governed by GPL License.
Maguma Studio is the source-level IDE, equipped with all the features known from other languages development environments. Maguma Studio gives developers a time-saving development tool.
GIMP is the answer to the current lack of free (or at least reasonably priced) image manipulation software for GNU/Linux and UNIX in general. The GIMP is suitable for a variety of image manipulation tasks, including photo retouching, image composition, and image construction.
by Audacity Development Team
for Windows (Open Source)
in the category of Audio/Video
Audacity(R) is a free, open source (cross-platform) digital audio editor, recorder and mixer. It is a mature software application, that comes with a long list of features.