Based on this thread, I downloaded RadRails last night.  After several
hours, I am extremely impressed.  It has good folder and file views.
It has superb CVS and SVN integration (it was trivial to setup cvs over
ssh to my pair.com webhosting account).  Unlike Scite, there's coloring
for .rhtml files.  It even has a SQL viewer, although not nearly as
powerful as MySQL-Front.  It also does a decent job on an interface for
the generators and Webrick.  If you use Windows, I recommend that you
give it a try.