rcs4cvs2svn prepares an RCS project for processing with cvs2svn.
rcs4cvs2svn is useful for developers who still have ancient source code floating around in RCS repositories and want to move it to a modern SCM system.
While rcs4cvs2svn does not provide any possibility to directly migrate to any other SCM system, it creates a copy of your RCS repository that can be processed by cvs2svn.
(You can of course use rcs4cvs2svn as replacement for various rcs2cvs scripts floating around. Unlike many of these scripts, rcs4cvs2svn can process filenames with space characters and handles any errors it encounters.)
These details are provided for information only. No information here is legal advice and should not be used as such.