See Indent Guides
in the Visual Studio Gallery for the latest stable release and end-user QA.
The screenshots are from Indent Guides v12.1
If you are interested in downloading the source for this project, you can access it from the Source Code tab above. Downloading the code associated with the latest release is strongly recommended
; there is no guarantee that any other commit either works or is complete. (You can download a particular changeset without Mercurial by clicking on the revision number before the Download link.)