freeware to compare db shema ?

Do you know a simple toll to compare 2 database shemas ?
ThanksHaven't heard of any freeware. I use SQL Compare from RedGate.|||The poor mans approach is to use EM to generate a script for each db then use a tool to compare text files.|||If you are going to use it for a one time job ... you may prefer to try the demo version of sql compare.