I'm always interested in tools that can download only changed chunks, or repair damaged files without having to re-download the whole lot. Habit, after being on

I'm always interested in tools that can download only changed chunks, or repair damaged files without having to re-download the whole lot. Habit, after being on extremely slow connections for about 15 years. See also: * http://atterer.org/jigdo http://atterer.org/jigdo * https://multipar.eu/ https://multipar.eu/ * I've abused webseed support in torrent clients to do similar things - a downloader based on the torrent chunk hashing format would be quite interesting * rsync can do it, maybe * http://xdelta.org/ http://xdelta.org/ - have used this to patch Raspberry Pi images