CCL: Looking for simple conformation analysis tool

Folks, can anybody suggest an open-source conformational analysis program that accepts a single structure, a small set of parameters and generates a set of low-energy conformers.  It would have to include some kind of force field, although it doesn't have to be complex...

Why do I want this?  We'd like to demonstrate how to connect compute codes to GUI codes, and need something to provide as an example, along with the interface, pre- and post-processing code required.  A one-stop shop as it were.  This struck me as a pretty good prototype for much of the interface work people need to do.

Thanks in advance!

Joe Leonard

"That's a paradox.  Could blow a hole in the space-time continuum the size of...  Well, actually the exact size of Belgium.  That's a bit undramatic, isn't it...  Belgium?"