Statist is a statistics program with an interactive menu that makes it very easy to use. It can also be run in scripts, and large data sets are handled reasonably well even on small machines. In spite of its low overhead, it can do quite a few regression functions and tests. It can produce colorized output, and uses gnuplot to create graphics.
The Cheap Matrix Package contains ready to use matrix and vector classes, optimized for minimum memory over speed. They were designed to have a natural syntax. It is possible to link with LAPACK, and utility functions. There is a framework for coding optimizers and building models, together with examples and documentation.
GTL can be seen as an extension of the Standard Template Library STL to graphs and fundamental graph algorithms. It is a platform independent and extendible C++ library, and is a useful aid to any software designer. It contains the classes needed to work with graphs, nodes, and edges, and some fundamental algorithms as building blocks for more complex graph algorithms. Customized algorithms can be developed by experienced programmers.
Maximum entropy is a powerful method for constructing statistical models of classification tasks, such as part-of-speech tagging in Natural Language Processing. The Quipu Maximum Entropy Package is a Java implementation of the maximum entropy framework. It allows you to train, evaluate, and use maxent models.
tkalc is a pocket calculator for developers and IP network operators. Arbitrary arithmetic or logical expressions can be entered very quickly in a text entry field. The result is then simultaneously displayed in decimal, hexadecimal, octal, binary, ASCII, IP address, and Boolean format. It accepts all number formats, operators, and functions that can be handled by the Tcl interpreter and extends this even further for input of IP addresses and binary numbers.
MayaVi is a free, cross platform, easy-to-use scientific data visualizer. It provides a powerful GUI to ease the visualization process. It is written in Python and uses the Visualization Toolkit (VTK) for the graphics. MayaVi can be scripted from other Python programs and also from the interactive Python interpreter. MayaVi includes the VTK Pipeline browser. The VTK Pipeline browser is a Python module (vtkPipeline) that enables one to view and configure the objects in the VTK pipeline graphically with a Tkinter-based GUI. The browser should work for any Python script that uses VTK. MayaVi also provides classes to pickle a VTK object and a simple class documentation browser.
WIMS (WWW Interactive Mathematics Server) is a CGI Web application designed to host interactive mathematical educational activities such as exercises, computational math, and graphing tools. It features automatic score processing with strong anti-cheating mechanisms, virtual classes allowing teachers to guide/control student works, online exercise creation, animated graphics, a message board allowing inline mathematical formulas, and more. It can also be easily used for education within other disciplines.