Is there a open source search engine?

All, I've got a Samba fileserver working pretty well, but it would be nice if I could have a web interface that allowed end-users to search for documents on the fileserver. Sort of like a google interface to the fileserver. The trouble is that a lot of the docs are in word, acrobat, etc. Does anyone know an open source search engine that has converters? I've looked at a couple of commercial search engines that would do the job, but I found the prices shockingly high. (i.e. $20K for a 100,000 document index) Greg Freemyer Internet Engineer Deployment and Integration Specialist Compaq ASE - Tru64 v4, v5 Compaq Master ASE - SAN Architect The Norcross Group www.NorcrossGroup.com