FuzzySec 

A simple and sane wrapper for a number of cryptographic functions in C#. Cryptographic operations include: AES, Triple DES, RC4, RC2, Multi-Byte XOR, XTEA, ECDH, RSA, DPAPI and TOTP.

A simple and sane wrapper for a number of compression functions in C#. Compression operations include: Direct3D shader compression, GZip, LZMA, LZNT1, HUFF, LZMS, MSZIP and XPRESS.