Depends on what you're looking for. Most of them are in the Seam Faces module, though not everything has been ported yet. Let us know if you're looking for anything specific.
Actually, I was going to look into providing a fix for JBSEAM-4546. I did not see the EqualityValidator in any of the modules. Has it not been ported?
I don't believe it has, the Faces module in Seam 3 is missing most of the validators / converters that were in Seam 2. Feel free to fork and send pull requests :)