MARS Long Distance Replication Software
See http://schoebel.github.io/mars/
Very detailed documentation / motivation / use cases can be found there. Please look into the docu/ subdirectory.
License: GPLv2+ (see file COPYING) Documentation is under FDL.
This is intended for the whole project, and is valid for all parts from the original author as well as parts from 1&1.
Any further contributors to contrib/ subdirectory are strongly encouraged to put their files also under GPL or FDL, or at least a compatible license (see newest descriptions at fsf.org).