Lzip 1.21 / 1.22 RC1
A data compressor based on the LZMA algorithm.
The lzip file format is designed for data sharing and long-term archiving, taking into account both data integrity and decoder availability:
The lzip format provides very safe integrity checking and some data recovery means. The lziprecover program can repair bit flip errors (one of the most common forms of data corruption) in lzip files, and provides data recovery capabilities, including error-checked merging of damaged copies of a file.
The lzip format is as simple as possible (but not simpler). The lzip manual provides the source code of a simple decompressor along with a detailed explanation of how it works, so that with the only help of the lzip manual it would be possible for a digital archaeologist to extract the data from a lzip file long after quantum computers eventually render LZMA obsolete.
Additionally the lzip reference implementation is copylefted, which guarantees that it will remain free forever.