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Asmoday is an easy to use 3D graphics library and engine for Freepascal developers. It uses OpenGL for hardware accelerated, cross plattform, real-time or offline rendering.
VoxRend is an OpenSource voxel graphic engine. It can be used to create games or simulations, but you can use it to get other graphic representations. Uses tile-maps and can load and render Ken's VOX files. Today it's inactive but I have plans for the
The software for solving special problems of mathematics and physics
The project "FD-Method For Solving PDEs" contains the software for solving the nonlinear Klein-Gordon equations (see www.arxiv.org/abs/1203.5979 for more detail).
The project "Infinite systems of matrix equations" consists in developing algorithms and software for solving systems of matrix equations. In the present version the project allows one to solve an infinite system of matrix equations which arises in the theory of stability preserving structural transformations of systems of second-order ODEs (see http://arxiv.org/abs/1204.1814).
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CO2 is a real-world simulator development package that integrates currently
available technologies in order to provide an ever wanted environment for
those who want to build simulators/games. The package includes an IDE called
VisualGameBuilder.
...The Irrlicht Engine is an open source high performance realtime 3D engine written in C++ and now available for Pascal. It is completely cross-platform, using D3D, OpenGL and its own software renderer.