ZipSnap

Simple command-line incremental backup tool for directories. Create compressed point-in-time snapshots, adding only new or modified files and directories at each time. Uses a catalog so snapshots can be added without access to previous ZIP volumes. Files are automatically numbered with a timestamp. Runs on any OS with the Java Runtime Environment (JRE 6+). Free GNU GPL software. Visit http://zipsnap.sourceforge.net/ for more information.