Preferred Ruby plugin for Eclipse?
Looks like the update site is here: http://download.eclipse.org/technology/dltk/updates/
I found it on www.eclipse.org/dltk/install.php
Try the Dynamic Languages Toolkit for Ruby. It's available from Eclipse's Software Updates panel.
Update May 2020: Ruby support was dropped in DLTK 6.0 in favour of Eclipse Solargraph.
Good question. I've used Aptana/radrails, and that's definitely one to steer clear of.
It writes a database in whatever directory you happen to start Eclipse from, and generally takes over Eclipse, changing a lot of useful key bindings.
One of the most irritating things is that Ctrl-1 stops working in Java files, and that's a hotkey I use all the time.
I'm looking forward to hearing people's answers on this one, because I'd like to know of a good one.