Very simple and very quick implementation of original Bruce Schneier's Twofish encryption algorithm. Program can encrypt and decrypt only whole folders (and pack/unpack them to/from one 'archive' file). WinTwf is freeware and you can use it for any purpose at your own risk.

+ Simple and fast.
+ Program doesn't need installation or configuration - just use it :).
+ From 128 to 256 bit Twofish encryption (it depends on length of key) is nearly unbreakable.
+ Warning! Be careful! If you lose key you lose encrypted data too!

Windows 95/98/2000/XP/2003

Simple rendering engine ideal for testing raytracing and pixel shader effects for your demos/intros or any 3D application you develop. You can very quick render your ideas. Source code contains base functionality and support for writing BMP files, antialiasing scaledown step and base rendering cycle. Output from attached example is below. For C/C++ programmers only :).

+ You must write only bodies of 2 functions for some output (geometry operation Hit() and color operation PixelShader()).
+ It is very simple to understanding.
+ Program isn't multiplatform but you can use DirectX vector operations, matrix operations, ...
+ Console application, output is bitmap file.

Windows 95/98/2000/XP/2003

1280x1024, simple tunnel, 5 white lights, procedural texture, black linear fog, 4x antialiasing