Yacas is a general purpose, easy to use Computer Algebra System (a CAS is a program that can be used to do symbolic manipulation of mathematical expressions). It is built on top of its own programming language designed for this purpose, in which new algorithms can easily be implemented. In addition, it comes with extensive documentation on the functionality implemented and methods used to implement them.
Jude is a rapid application development tool to develop data management workgroup applications that easy-to-maintain for developers and easy-to-use for end users. It is based on a knowledge base with an object oriented structure on the server side and a compound document agent-based user interface on the client side.
Rascal, the Advanced Scientific CALculator, is a platform-independent modular calculator. It is based on modules for supporting its various data types, and it can be easily extended with existing C or C++ code. The available modules are integers, long numbers, doubles, strings, vectors, matrices, complex numbers, Taylor arithmetic (automatic differentiation), and fractions.
Traduki is a free machine translation system written in C/Lua. It works by creating an interlinguistic representation of text in Lua tables, the representation being somewhat modelled on the generative grammar of Noam Chomsky. Traduki aims to feature support for less common languages.
FlipDCD is a small utility for reversing the endianism of binary DCD trajectory files from Charmm and NAMD. This can be useful when running simulations on one architecture and visualizing or analyzing the results on another. FixDCD is a tiny utility to modify the header of an X-PLOR DCD file to make it readable by programs expecting Charmm DCD files, at the expense of a Timestep size value in the header.
MatDCD is a Matlab package for reading/writing DCD-formatted molecular dynamics trajectory files. It supports Charmm and xplor-format DCD files, it can read both big- and little-endian storage formats, and it can specify which atom indices to load without having to load the entire file.