QMentat helps you practice mental arithmetic. It uses arbitrary-length fixed point arithmetic, and can handle any size numbers, only limited by the size of your screen (and in the case of division with an integer result, the speed at which the number can be factored). It is also quite configurable, allowing you to tailor the questions to your needs.
Klen-library is a program for creating electronic books. It consists of three modules, for editing books, reading books, and creating tests. It offers password protection of every book and the editing mode. The print function makes it self-sufficient, as it allows creation of books without using third-party text editors. It uses SQLite, so you don't have to install a database server. It can export to the XWB, HTML, TXT, PDF, PostScript, and RTF formats, and can import from XWB, HTML, and TXT.
Shelk-test is a program for creating tests for students. Tests take up just three modules: creation, testing, and reporting. Shelk-test can insert images into all types of questions, making it possible to create a question such as "What is shown in the picture?" All tests are stored centrally in a SQLite database, increasing reliability and allowing you to have a database file without having to install a database server.
Emma the Emulator is a generic 16-bit CPU emulator written as an educational tool. It supports a basic instruction set, has two registers and a program counter pointing to a heap structure which can be resized at compile time, and has a basic stack (not linked to the heap in any way), a flag register, and an internal "error number" for debugging purposes. There is also a "debug" mode which adds a lot of runtime debugging information and causes the program to sleep for 1 second between operations.
FroZenLight interrelates line arts, mathematics, and cryptography. Circular shaped mirrors which are arranged in a grid-like manner reflect a light ray according to the reflection law of geometric optics. While random positions of the light source produce chaotic reflection patterns, it is possible to position the light source so that beautiful symmetric reflection patterns are created.
AbulEdu Calcul Mental is a software tool that trains children in mental calculation as stipulated by the French Ministry of Education for primary schools. Activities include addition, subtraction, multiplication of integers, addition tables (+2 to +9), times tables (x2 to x9), additional additives (to 10, to 100, to 1000), multiples (of 5, 10, 15, 20, 25 and 50), and orders of magnitude (with additions, subtractions, and multiplications). There is also an editor and selective launcher.
RobotMinds is a simulation of a tournament in which programmable robots compete. Each robot's objective is to find its way out of a maze to its home tile. The robots have sensors, and can act on what they sense. There are toxic tiles and radiation from other robots that will destroy robots if exposed to it for too long. The robots can be programmed by way of four screens of checkboxes representing binary switches, so you can program a robot with no knowledge of any programming languages. You can lay walls or full maps to restrict movement.