Linux ERD software

I don't normally need an ERD, but this latest project I'm on has some pretty complex database tables, and as I'm working with someone else on it, I need to plan out exactly how all the tables relate to each other properly. Do any of you have any suggestions for ERD software that will run on Linux. It can't be web-based (unless it's something I can run easily on my own local server) as I won't have access to the Internet all the time I'm working on this. Thanks, Ash http://www.ashleysheridan.co.uk