Accurev

Link : http://www.accurev.com/

License : Commercial

Aegis

Link : http://aegis.sourceforge.net/

License : GPL

Arch

Link : http://www.gnu.org/software/gnu-arch/

License : GPL

BitKeeper

Link : http://www.bitkeeper.com/

License : Commercial

Bazaar

Link : http://bazaar.canonical.com/

License : GPL

Status : Started

Clearcase

Link : http://www-306.ibm.com/software/awdtools/clearcase/

License : Commercial

Status : Started

Clearcase Multisite

Link : http://www-306.ibm.com/software/awdtools/clearcase/multisite/

License : Commercial

CM Synergy

Link : http://www.telelogic.com/products/synergy/

License : Commercial

Status : Started

Code Co-op

Link : http://www.relisoft.com/co_op/

License : Commercial

CVS

Link : https://www.cvshome.org/

License : GPL

Implementation 1 : command line

Status : Started

Implementation 2 : pure java with cvslib

Status : Started

Darcs

Link : http://abridgegame.org/darcs/

License : GPL

File system

Link : None

License : None

Status : Started

Mercurial

Link : http://www.selenic.com/mercurial/wiki/

License : GPL

Status : Started

Monotone

Link : http://www.venge.net/monotone/

License : GPL

OpenCM

Link : http://www.opencm.org/

License : GPL

Perforce

Link : http://www.perforce.com/

License : Commercial

It is licensed at no charge for use on open source projects.

Status : Started

PureCM

Link : http://www.purecm.com/

License : Commercial

Serena PVCS / Dimension

Link : http://www.serena.com/Products/dimensions/home.asp http://www.synergex.com/solutions/pvcs/default.asp

License : Commercial

Starteam

Link : http://www.borland.com/us/products/starteam/index.html

License : Commercial

Status : Started

Starteam Enterprise

Link : http://www.borland.com/us/products/starteam/index.html

License : Commercial

Subversion

Link : http://subversion.tigris.org/

License : CollabNet/Tigris.org Apache-style license

Implementation 1 : command line

Status : Started

Implementation 2 : pure java with javasvn

Svk

Link : http://svk.elixus.org/

License : ???

Vesta

Link : http://www.vestasys.org/

License : LGPL

Visual Source Safe

Link : http://msdn.microsoft.com/ssafe/

License : Commercial

Status : Started