Research Assistant has been succeeded by RRiki
I am in the process of completing RRiki, the successor to Research Assistant. RRiki is written in Ruby using the Ruby on Rails framework and runs off any webbrowser (Firefox 1.5 was used during development). RRiki should be more user friendly than RA, easier to maintain (for me and any other developer) and, for people with a little experience with css, easily customizable.
The original page for RA is here