portable

What is a portable program ? : A portable program is a piece of software that you can carry around with you on a portable device and use on any other computer. It can be your email program, your browser, system recovery tools or even an operating system. The coolest part about it, is that all of your data and settings are always stored on a thumbdrive so when you unplug the device, none of your personal data is left behind
Portable7zip is a file archiver that supports the new “7z” format with very high compression ratio using LZMA compression. In addition, it supports the creation/extraction of 7z, ZIP, GZIP, BZIP2 and TAR files, as well as the extraction of RAR, CAB, ISO, ARJ, LZH, CHM, Z, CPIO, RPM, DEB and NSIS files.