lrzip

compression program with a very high compression ratio

A compression program that can achieve very high compression ratios and speed when used with large files. It uses the combined compression algorithms of zpaq and lzma for maximum compression, lzo for maximum speed, and the long range redundancy reduction of rzip. It is designed to scale with increases with RAM size, improving compression further. A choice of either size or speed optimizations allows for either better compression than even lzma can provide, or better speed than gzip, but with bzip2 sized compression levels.

lrzsz

Tools for zmodem/xmodem/ymodem file transfer

Lrzsz is a cosmetically modified zmodem/ymodem/xmodem package built from the public-domain version of Chuck Forsberg's rzsz package. These programs use error correcting protocols ({z,x,y}modem) to send (sz, sx, sb) and receive (rz, rx, rb) files over a dial-in serial port from a variety of programs running under various operating systems.