UPX        v3.91 (2013-09-30)
The Ultimate Packer for eXecutables
Copyright © 1996-2013 Markus Oberhumer, Laszlo Molnar & John Reiser

http://upx.sourceforge.net

UPX is a portable, extendable, high-performance executable packer for several different executable formats. It achieves an excellent compression ratio and offers very fast decompression. Your executables suffer no memory overhead or other drawbacks for most of the formats supported, because of in-place decompression.

UPX can be distributed and used freely. And UPX is released under the GNU General Public License (GPL)

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