BigAl is a platform independent program for calculating really big numbers. It supports not only standard arithmetic, but also calculations with numbers stored in files, exact period determination, continued calculation with predefined factorials, fibonacci with customized seeds, lucas, factorization, ackermann, nth root, random number generation, and more.
The Chemical Structures project aims to provide a complete set of 3D molecular structures in CML format. As CML format permits structural data and many properties to be included, each file also contains additional information, like molecular weight, boiling point, melting point, or InChI code. Data can be explored with a CML-aware software, like Jmol, or by using a Web browser.
GraSy is a tool that converts context-free grammars, which are written in the "Backus-Naur Form" (BNF), into syntax diagrams and the other way around. The grammar and the syntax diagrams can be saved with g2s-file. It is also possible to export syntax diagrams as PostScript files. To keep a good overview while creating syntax diagrams it is possible to change the zoom level.
The GradeCalculator is a tool to calculate your personal final study grade (for a bachelor's or master's degree). The GradeCalculator helps you easily compute your average grades per semester, to monitor your academic performance, and to check your final grade calculated by the university. It's available in 15 different languages and can be customized for your university by editing XML files.
HeeksCAD is a CAD application. It can import solid models from STEP and IGES files, draw construction geometry and lines and arcs, create new primitive solids, or make solids by extruding a sketch or by making a lofted solid between sketches. Solids can be modified using blending or boolean operations. Models can be saved as IGES, STEP, and STL. The 2D geometry can be plotted with a printer or to HPGL. DXF files can be imported and exported; lines, arcs, spline, ellipses, and polylines are supported. SVG import has similar capabilities. It is possible to make Add-In modules. The HeeksCNC project provides a CAM add-in, and HeeksPython provides a Python console.