LZ4 is a very fast compressor, based on well-known LZ77 (Lempel-Ziv) algorithm.
Originally a fork from LZP2, it provides better compression ratio for text files and reaches impressive decompression speed, in the range and beyond 1GB/s per core (!), especially for binary files. These speeds are scalable with multi-threading modes, quickly reaching RAM speed limits on multi-core systems.
The version proposed here is for Windows. It works on 32 and 64 bits systems.
The -c1 mode serves as a living demo for MMC (Morphing Match Chain) search algorithm (explained here).
The -c2 mode is equivalent to lz4hc.