ClearCase VC (CC-VC) Save
An extension of the GNU Emacs VC package which understands the ClearCase configuration management system. This package is not officially supported, but the author is willing to fix bugs in it as time permits.
ftp://rtfm.mit.edu/pub/cc-vc/   

Clearcase VC for NT Emacs Save
Extension to the Emacs lisp version control package, not just for NT.
http://www.fukt.hk-r.se/~flognat/vc/   

Emacs ClearCase integration Save
This is a ClearCase integration package for GNU Emacs (implemented as a vc.el backend) that works with recent versions of it (including CVS version).
http://vc-clearcase.sourceforge.net/   

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