cwRsync is an implementation of rsync for Windows. Rsync uses a file transfer technology specified by the rsync algorithm, transferring only changed chunks of files over the network. cwRsync can be used for remote file backup and synchronization from/to Windows systems. cwRsync contains Cygwin DLLs and a compiled version of rsync on Cygwin. A client GUI is also provided as of the version 5.0.0.

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The first version of cwRsync was developed to address requirements of an internal project at Color Line, and was published as a free solution on the mailing list for rsync users. cwRsync quickly became very popular^[2][3] and is kept updated with newer versions of underlying solutions. The initial release was on March 11, 2003.^{[citation needed]}

As of August 2018 the free version of cwRsync server is discontinued and the last free version 5.7.2 is no longer directly available from Itefix.^[4] At this point only the commercial binary installers of version 5.7.2 can be obtained as paid downloads. cwRsync Client remains freely available under a BSD-style licence.^[5]

cwRsync comes in two versions: cwRsync client and cwRsync server. You can use the cwRsync client to initiate rsync transfers from your host, while the cwRsync server makes your files/directories available for upload/download for rsync transfers. cwRsync client contains a Secure channel wrapper to set up external secure ssh channels.

Rsync client GUI has following features:

• Specify sources and destination (local, remote ssh and daemon modes)
• Specify filters and a subset of options
• Create rsync command according to your specification
• Run rsync on the fly both in production and test mode
• Create batch files for task scheduling
• Save and load your favorite rsync settings as profiles
• Language localization

cwRsync uses Cygwin conventions, which means:

• The path separator is forward slash (/), not backslash (\)
• Instead of drive letters C:/, D:/, etc, it uses /cygdrive/c/, /cygdrive/d/, etc
• Like the original rsync, text followed a colon (":") in a path name is interpreted as a computer name. This means if you use a path name like "C:/Users/Pat/My Documents", cwRsync will look for "Users/Pat/My Documents" on a computer with the network name "C" and probably fail. The correct way is to use the Cygwin path as shown above: /cygdrive/c/Users/Pat/My Documents.

• GS RichCopy 360
• rsync
• File Transfer Protocol