Truth is an extensible DSL for defining and enforcing truth in a datacenter. You can think of it as a more flexible rackmonkey that has the power to enforce itself by generating DNS and DHCP configs.
Truth is very much a work in progress. Things that are on the table to work on next include a user interface, puppet/chef integration (e.g. an API endpoint for extlookup() calls, and more work tuning the vision. Any and all help would be appreciated :)
Fork the repo and send me a pull request, and I'll probably be more than happy to merge it in.