FSG - F[ast] S[mall] G[ood] is a perfect compressor for executable files, its decompression code is only 158 bytes long, it's compatible with Windows 95 / 98 / ME / 2K / XP / Vista / 7.
Altova DiffDog 2005 Standard Edition is the dedicated differencing utility for developers and power users. This easy, powerful synchronization tool quickly compares files and folders then highlights differences and merges content via an elegant GUI.
.NET code Security Tool is an obfuscation tool for .NET code protection. It implements all known software protection techniques and obfuscation algorithms.