QVCS $39.00
Allows you to capture snapshots of work in progress so you can safely move on to newer revisions of your work.It matches most of the features of the market leading products and includes a full-featured GUI and command line utilities for batch operations.
STANDARD FEATURES INCLUDE:
save a file revision
retrieve a file revision
lock a revision for update
unlock a locked revision
parallel development of the same source file (branching)
compress logfiles to minimize storage
embed revision comments in source at point of revision.