MPRESS

MPRESS is a free, high-performance executable packer for 64-bit, 32-bit, .NET executable formats!
MPRESS compresses PE32 (x86,32-bit), PE32+(x64, AMD64, 64-bit) programs and libraries and .NET applications, makes them smaller, and decrease start time when the application loaded from a slow removable media or from the network. It uses in-place decompression technique, which allows to decompress the executable without memory overhead or other drawbacks; it also protects programs against reverse engineering by non-professional hackers. Programs compressed with MPRESS run exactly as before, with no runtime performance penalties.
MPRESS is absolutely free of charge software, therefore you can use MPRESS for your commercial project without needs to make it opensource. MPRESS uses LZMAT - extremely fast data compression algorithm.
MPRESS Features:
Advanced compression of .NET executable files (anyCPU,x86,AMD64,IA64 EXE)
Support for MS Framework 1.0/1.1/2.0/3.0
Does not require .NET Framework to be installed
Advanced compression of PE32/PE32+ (AMD64) executable files (EXE, DLL, OCX, etc.)
Very fast decompression: ~210 MB/sec on an AMD 2500+
Static TLS support
Iin-place decompression
Optional LZMA compression
Strip sensitive information (relocation, debug information, exceptions, etc.)
Compression of program code, data, and resources
Completely transparent, self-contained operation with UNICODE support
Command line interface allows to use MPRESS from a batch or from a make file
Full Windows 9x/NT/2000/XP/2003/Vista/2008 compatibility