This is a lightweight updating software made in C++ with Qt that is quite customizable with only a text file, or you can get the full source and edit it to your hearts desires.
MoleSvn is a SubVersion (svn) client frontend for the BeOS/Zeta operating system, implemented as a Tracker extension (like TortoiseSvn for Windows operating system).
It incorporates a diff viewer, to easily view and resolve conflicts.