Does anyone know of a free, decent alternative for SmartDraw or MS Visio?
I'm taking a database design class, and all I need is something decent to draw ERD's (Chen and Crow's Foot, Rein85, IDEF1X...).

Right now, I'm using SmartDraw, but that's a 30-day trial. After the 30 days, I'll have to switch to Visio and use its 30-day trial (that's basically enough since my class only lasts 8 weeks - I just don't want to have to switch). I know it can be done with PSP (or even Paint), but I'm looking for something a little more up to the task...