Where's Forge?

[eluser]dshafer[/eluser]
I listened to the podcast about CI this morning and the speaker mentioned Rapyd and Forge as great plug-ins for CI. I found Rapyd and I'm studying it. I thought Forge was cited as a class for creating, validating and managing forms but I can't seem to find it by searching the site.

Can someone point me to it, please?

Thanks.