The folks at Clarius have an update to their T4 template editor. They’re now in Beta. It’s a very useful editor for anyone doing large amounts of T4 template editing with good factoring of template code vs script and color coding of keywords.
In case you’re looking for the DSL Tools forum and can’t find it at its last location, it has moved into the VSX (stands for Visual Studio Extensibility 🙂 forum, so you can ask your DSL-related questions there. And, here’s the new link: http://forums.microsoft.com/MSDN/ShowForum.aspx?ForumID=57&SiteID=1.