ASPack

ASPack is an advanced solution created to provide Win32 EXE file packing and to protect them against non-professional reverse engineering.

ASPack makes Windows programs and libraries smaller up to 70% (the compression ratio is higher than the ZIP standard by 10-20%), and decrease load times across networks, and download times from the internet.
The ASPack executable compressor also provides protection to programs/application from unprofessional analysis, debuggers and decompilers. Programs compressed with ASPack are self-contained and run exactly as before, with no runtime performance penalties.