UPX 3.07 eXecutable Packer

UPX 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 3.07 has been released. It is a minor 3.0x maintenance release to version 3 whose major additions were:

optional LZMA compression
support for BSD systems

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User visible changes for UPX
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Changes in 3.07 (08 Sep 2010):
* win32/pe: fixed relocation handling for files with *no* TLS callbacks
[severe bug introduced in 3.06]

Changes in 3.06 (04 Sep 2010):
* win32/pe: TLS callback support contributed by Stefan Widmann. Thanks!
* bug fixes



other Builds

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Free UPX 1.3 GUI for UPX

Free UPX - Gui for UPXFree UPX is an advanced graphical interface for the UPX (Ultimate Packer for eXecutables). It allows you to compress (and decompress) files produced according to Microsoft Portable Executable and COFF Specification (EXE, DLL, OCX, BPL, CPL and other). It offers easy access to all documented and undocumented UPX parameters without the need for command line usage.
Free UPX is definitely the most complete GUI for UPX.

Homepage: http://www.pazera-software.com/products/free-upx/

Download: http://www.pazera-download.com/system_utilities/Free_UPX.zip