TortoiseSVN is a really easy to use Revision control / version control / source control software for Windows. It is based on Subversion. TortoiseSVN provides a nice and easy user interface for Subversion.
It is developed under the GPL. Which means it is completely free, including the source code. But just in case you don't know the GPL too well: you can use TortoiseSVN to develop commercial applications or just use it in your company without any restrictions.
Since it's not an integration for a specific IDE like Visual Studio, Eclipse or others, you can use it with whatever development tools you like.
As a Subversion client, TortoiseSVN has all the features of Subversion itself, including:
- Most current CVS features.
- Directories, renames, and file meta-data are versioned.
- Commits are truly atomic.
- Branching and tagging are cheap (constant time) operations.
- Efficient handling of binary files.
- BUG: "Diff with url" generated patch does not apply.
- BUG: "restore after commit" must restore on cancel as well.
- BUG: TortoisePlink crash for x64.
- BUG: Crash fetching properties in CfM dialog.
- BUG: Log dialog message loses formatting after clicking a link.
- BUG: TortoiseBlame: Blue wavy lines in C header files.
- BUG: TortoiseMerge fails to restore Unicode characters.
- BUG: revision graph export to svg fails to escape text.
- BUG: log dialog does not fetch all revisions specified in merge dialog.
- BUG: TSVNCache crash when removing cached data.
- BUG: "update" not available in check-for-modifications context menu.