This is a Visual Basic (versions 5 and 6) crytography project written by Alexander Levakov. It functions as an excellent crytography programming tutorial.
CryptoSys is a commercial site which offers cryptography software tools for Visual Basic developers. Included are many symmetric algorithms (Rijndael, DES, 3DES, and Blowfish) together with various one-way hash functions (SHA-1 and SHA-256).