Portable 7-Zip 4.57 M.Lang.
7-Zip is an open source file archiver with the high compression ratiopredominantly for the Microsoft Windows operating system. It operateseither as a command line program or with a graphical user interface. Italso features integration with the Windows shell environment. 7-Zip isfree software, developed by Igor Pavlov and distributed under the GNULGPL license.

PowerArchiver 2009 v11.01.03.
PowerArchiver contains all the basic features you would expect from a compression program / archive utility - you can read and extract from manydifferent formats and you can also create archives in many different formats, including 7-Zip which is one of the best compression formats currently used. What makes PowerArchiver different from many [...]

Bitsum PECompact 2.98.1.
Bitsum PECompact 2.98.1 Executable compressors work by compressing selected portions of executables. At runtime, compressed executables are decompressed and reconstructed directly into their virtual image (memory) so that no data is ever written to the disk. The executable can therefore be run exactly as it was before without the user even knowing it [...]