Incremental backup tool for directories. Free software written in Java.
ZipSnap creates archives that are collections of point-in-time snapshots. An archive is just a directory of catalogs (plain text files compressed as ZIP files) and compressed volumes (ZIP files). When a snapshot is added to an archive, a new compressed volume is created, containing only new or modified files and directories. A catalog is used to store information on the snapshots and contents of the archive. Files are automatically numbered with a timestamp. Runs on any OS with the Java Runtime Environment (JRE 6+).
ZipSnap is free software written in Java and released under the GNU GPL license (version 2).
Download: ZipSnap 2.1