Subversion is an open source version control system. Founded in 2000 by CollabNet, Inc., the Subversion project and software have seen incredible success over the past decade. The open source community has used Subversion widely: for example in projects such as Apache Software Foundation, Free Pascal, FreeBSD, GCC, Django, Ruby, Mono, SourceForge, ExtJS, Tigris.org, PHP and MediaWiki. Google Code also provides Subversion hosting for their open source projects. Its feature include 
 <UL>
	<LI>Most CVS features</LI>
	<LI>Directories are versioned</LI>
	<LI>Copying, deleting, and renaming are versioned</LI>
	<LI>Atomic commits</LI>
	<LI>Branching and tagging are cheap (constant time) operations</LI>
	<LI>Merge tracking</LI>
	<LI>File locking</LI>
	<LI>Apache network server option, with WebDAV/DeltaV protocol</LI>
	<LI>Symbolic links can be versioned</LI>
	<LI>Standalone server option (svnserve) </LI>
	<LI>Localized messages</LI>
	<LI>Interactive conflict resolution</LI>
	<LI>Repository read-only mirroring</LI>
	<LI>Natively client/server, layered library design with clean APIs</LI>
	<LI>Binary files handled efficiently </LI>
	<LI>Bindings to programming languages such as such as Python, Perl, Java, and Ruby</LI>
	<LI>Changelists</LI>
 </UL>

Subversion is an open source version control system. Founded in 2000 by CollabNet, Inc., the Subversion project and software have seen incredible success over the past decade. The open source community has used Subversion widely: for example in projects such as Apache Software Foundation, Free Pascal, FreeBSD, GCC, Django, Ruby, Mono, SourceForge, ExtJS, Tigris.org, PHP and MediaWiki. Google Code also provides Subversion hosting for their open source projects.

Subversion

Git is a free & open source, distributed version control system designed to handle everything from small to very large projects with speed and efficiency. Every Git clone is a full-fledged repository with complete history and full revision tracking capabilities, not dependent on network access or a central server. Branching and merging are fast and easy to do. Its features include: 
 <UL>
	<LI>Distributed development </LI>
	<LI>Strong support for non-linear development</LI>
	<LI>Efficient handling of large projects</LI>
	<LI>Cryptographic authentication of history</LI>
	<LI>Toolkit design</LI>
 </UL>

Git is a free & open source, distributed version control system designed to handle everything from small to very large projects with speed and efficiency.

Darcs is a distributed advanced revision control system written in Haskell. It is similar to Git, Mercurial and Bazaar. User will have own personnel repository and commits his changes to it. Later the changes are pushed to the centralized repository. Every repository is a branch and it provides support to integrate the changes between them. It provides support to send the changes by email. The fundamental difference is that Git, Mercurial and Bazaar maintains a chronological order in the changes of the repository. Darcs manipulates patches instead of chronological revisions, so darcs maintains a more fine-grained order on changes, that could be called patches dependencies.

Darcs is a distributed advanced revision control system written in Haskell. It is similar to Git, Mercurial and Bazaar. User will have own personnel repository and commits his changes to it. Later the changes are pushed to the centralized repository. Every repository is a branch and it provides support to integrate the changes between them. It provides support to send the changes by email.

Darcs - Distributed Revision Control in Haskell

GitLab Community Edition (CE) is open source software to collaborate on code. Create projects and repositories, manage access and do code reviews. Each project has a wiki backed up by a separate git repository. Use the ticketing system included in GitLab or integrate your existing system and lot more.
 
 GitLab has built-in Continuous Integration and Continuous Deployment to test, build, and deploy your code. You can easily monitor the progress of your tests and build pipelines. Then deploy with the confidence that your code has been tested across multiple environments.

GitLab Community Edition (CE) is open source software to collaborate on code. Create projects and repositories, manage access and do code reviews. Each project has a wiki backed up by a separate git repository. Use the ticketing system included in GitLab or integrate your existing system and lot more. 

Gitlab - The platform for modern developers

GVFS stands for Git Virtual File System, It manages massive Git repositories possible. GVFS virtualizes the file system beneath your git repo so that git and all tools see what appears to be a normal repo, but GVFS only downloads objects as they are needed. GVFS also manages git's sparse-checkout to ensure that git operations like status, checkout, etc., can be as quick as possible because they will only consider the files that the user has accessed, not all files in the repo.
 
Git struggles to handle enterprise-scale repositories. Operations like cloning will slow to a crawl when you have millions of files in a repository, and even something as simple as getting your repository status will leave you waiting. GVFS was created by the Visual Studio Team Services team at Microsoft, specifically to deal with these scale issues for Microsoft's own codebases.

GVFS stands for Git Virtual File System, It manages massive Git repositories possible. GVFS virtualizes the file system beneath your git repo so that git and all tools see what appears to be a normal repo, but GVFS only downloads objects as they are needed. GVFS also manages git's sparse-checkout to ensure that git operations like status, checkout, etc., can be as quick as possible because they will only consider the files that the user has accessed, not all files in the repo.

GVFS - Git Virtual File System, Manages massive Git repositories

Mercurial is a free, distributed source control management tool. It offers you the power to efficiently handle projects of any size while using an intuitive interface. It is easy to use and hard to break, making it ideal for anyone working with versioned files. Traditional version control systems such as Subversion are typical client-server architectures with a central server to store the revisions of a project. In contrast, Mercurial is truly distributed, giving each developer a local copy of the entire development history. This way it works independent of network access or a central server. Committing, branching and merging are fast and cheap. Mercurials implementation and data structures are designed to be fast. You can generate diffs between revisions, or jump back in time within seconds. Therefore Mercurial is perfectly suitable for large projects such as OpenJDK (hg) or NetBeans (hg).

Mercurial is fast and powerful. Mercurial offers you the power and speed to efficiently handle projects of any size and kind. Every clone contains the whole project history, so committing, branching, tagging and merging are local operations which makes them fast and convenient. You can use a multitude of workflows and easily enhance its functionality with extensions.

Mercurial

Fossil is a distributed version control like Git and Mercurial. Fossil also supports distributed bug tracking and distributed wiki all in a single integrated package. It is simple, high-reliability, distributed software configuration management. Its feature include: 
 <UL>
	<LI>Bug Tracking And Wiki</LI>
	<LI>Web interface</LI>
	<LI>Autosync - avoids forking and merging</LI>
	<LI>Uses HTTP for all network communications, it works fine from behind restrictive firewalls</LI>
	<LI>CGI Enabled</LI>
	<LI>Fossil stores content in an SQLite database so that transactions are atomic even if interrupted by a power loss or system crash</LI>
 </UL>

Fossil is a distributed version control like Git and Mercurial. Fossil also supports distributed bug tracking and distributed wiki all in a single integrated package. It is simple, high-reliability, distributed software configuration management.

Fossil

RhodeCode is an open source repository management platform. It provides unified security and team collaboration across Git, Subversion, and Mercurial. Pick the repository type depending on your project, not on your code management tool. Read and write in all repository types from one central point, and see commits, forks, and changeset merges at a glance. Its features include Intuitive System Management, Full text search, Access Management, Change log etc.

RHodeCode - Centralized control for distributed repositories

OpenCVS is a FREE implementation of the Concurrent Versions System, the most popular open source revision control software. It can be used as both client and server for repositories and provides granular access control over data stored in the repository. It aims to be as compatible as possible with other CVS implementations, except when particular features reduce the overall security of the system. The OpenCVS project was started after discussions regarding the latest GNU CVS vulnerabilities that came out. Although CVS is widely used, its development has been mostly stagnant in the last years and many security issues have popped up, both in the implementation and in the mechanisms.

OpenCVS is a FREE implementation of the Concurrent Versions System, the most popular open source revision control software. It can be used as both client and server for repositories and provides granular access control over data stored in the repository. It aims to be as compatible as possible with other CVS implementations, except when particular features reduce the overall security of the system.

OpenCVS

Monotone is a free distributed version control system. It provides a simple, single-file transactional version store, with fully disconnected operation and an efficient peer-to-peer synchronization protocol. It understands history-sensitive merging, lightweight branches, integrated code review and 3rd party testing. It uses cryptographic version naming and client-side RSA certificates. It has good internationalization support. Its feature include: 
 <UL>
	<LI>Store multiple versions of files you are working on efficiently</LI>
	<LI>Transmit changes to files between you and your colleagues</LI>
	<LI>Merge changes you make with those your colleagues make</LI>
	<LI>Make notes about your opinion of the quality of versions of files</LI>
	<LI>Make decisions about using or ignoring versions, depending on the notes you receive from others</LI>
 </UL>

Monotone is a free distributed version control system. It provides a simple, single-file transactional version store, with fully disconnected operation and an efficient peer-to-peer synchronization protocol. It understands history-sensitive merging, lightweight branches, integrated code review and 3rd party testing. It uses cryptographic version naming and client-side RSA certificates.

Monotone

CVS is a version control system, an important component of Source Configuration Management (SCM). Using it, you can record the history of sources files, and documents. CVS is a production quality system in wide use around the world, including many free software projects. 
 <ul><li>It can run scripts which you can supply to log CVS operations or enforce 
 site-specific polices.</li><li> Client/server CVS enables developers scattered by geography or slowmodems to function as a single team. The version history is stored on
a single central server and the client machines have a copy of all the files that the developers are working on. Therefore, the network between the client and the server must be up to perform CVS operations
(such as checkins or updates) but need not be up to edit or manipulate the
current versions of the files. Clients can perform all the same
operations which are available locally.</li><li>In cases where several developers or teams want to each maintain
their own version of the files, because of geography and/or policy,
CVS's vendor branches can import a version from another team
(even if they don't use CVS), and then CVS can merge the changes from
the vendor branch with the latest files if that is what is desired. </li><li>
Unreserved checkouts, allowing more than one developer to work on
the same files at the same time.</li><li>CVS provides a flexible modules database that provides a symbolic mapping of names to components of a larger software distribution. It
applies names to collections of directories and files. A single
command can manipulate the entire collection. </li></ul>

CVS is a version control system, an important component of Source Configuration Management (SCM). Using it, you can record the history of sources files, and documents. CVS is a production quality system in wide use around the world, including many free software projects.

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