This is a computer algebra system designed specifically for the solution of problems encountered in field theory. It has extensive functionality for tensor polynomial simplification including multi-term symmetries, fermions and anti-commuting variables, Clifford algebras and Fierz transformations, implicit coordinate dependence, multiple index types and many more. The input format is a subset of TeX.

Klee is a script font handwritten by pencil or pen. It's quiet design has an elegant look that sets itself apart from traditional script and textbook fonts. Ideal for body text.

Kontrast is a color contrast checker and tells you if your color combinations are distinct enough to be readable and accessible.

True to its name, Stick is designed with straight lines that create a cute and playful feel. The pastoral ambience also gives this font wide versatility for use in both paper mediums and digital content.

litecli is a command line interface for SQlite with auto-completion and syntax highlighting. It is also capable of pretty printing tabular data.

Train (distributed as "Railway" in Japan by Fontworks) is a gothic-style typeface made with an outer and inner line. It is open and vibrant, and its strong first impression makes it suitable for logos and titles.