.

[xibalba]

.

[mortenaa]

Well, there is LispIDE http://www.daansystems.com/lispide/ which is very basic, but does what you want.

[nuntius]

None of the CL implementations require using emacs; its just that Slime has put more effort into supporting them than other editors have.

ABLE is a basic GUI editor that works with several free implementations.

Really, any editor that has a framework for stream I/O could interoperate with a free CL implementation. Something like Slime's Swank protocol is only needed if you want stuff like interactive stack traces, tab completion, and function documentation.

[gugamilare]

If you like shining colorful editors, there is Cusp, a plugin for Eclipse.

[hayden]

I highly recommend Cream (apt-get install cream)

It's a customized install of Gvim and it's wonderful. It has everything I need and so much more.

That being said, I only want syntax highlighting and par edit, but I'm sure it could do more in capable hands, it is vim underneath, after all!

[findinglisp]

If you really want to take the red pill with Lisp, Emacs is the only long-term choice, IMO. It's turtles all the way down from there.