The Rivet mailing list is the first place you should turn for help, if you haven't found the solution to your problem in the documentation. Send email to <rivet-dev@tcl.apache.org>. If you have a question, idea, or comment about the Rivet code itself, please send us email at <rivet-dev@tcl.apache.org>. To subscribe to either list, post email to <rivet-list-subscribe@tcl.apache.org>, where list is either dev or user. Currently, dev is the preferred list to use.
The mailing list archives are available at http://mail-archives.apache.org/eyebrowse/SummarizeList?listId=118
The news:comp.lang.tcl newsgroup is a good place to ask about Tcl questions in general. Rivet developers also follow the newsgroup, but it's best to ask Rivet-specific questions on the Rivet list.
There are several web sites that cover Apache and Tcl extensively.
Apache Rivet uses the Apache Bug Tracking system at http://issues.apache.org/bugzilla/. Here, you can report problems, or check and see if existing issues are already known and being dealt with.
Rivet makes available code for two popular editors, emacs and vim to facilitate the editing of Rivet template files. The key concept is that the editor is aware of the <? and ?> tags and switches back and forth between Tcl and HTML modes as the cursor moves. These files, two-mode-mode.el and rvt.vim are available in the contrib/ directory.