What's your favorite RoR editor/IDE?

Ideally I'd find something like HomeSite, which I love and has about the
right amount of features while staying out of your way. What else is out
there that works well for Ruby?

Omygod! There's still another homesite user out there? I'm still using
my 5 year old version Homesite 5.0 and I just don't ever want to switch
to another editor. It think it achieved the perfect number of
features/settings, whenit was bought and discontinued -- the best thing
that ever happened to it, as it kind of froze it in 2002.

I've just found this:
For HomeSite, I'm going to give it a whirl.