Apostrophe S

Since I’ve been reading more plays these days, I’m on the lookout for a resource that works like IMDb, but is specifically for plays and playwrights (and maybe theatres and actors and dates and such). Does such a thing exist?

UPDATE: I stumbled upon The PlayFinderâ„¢, which contains over 3,000 plays which are licensed by Dramatists Play Service. It’s a good resource for many contemporary plays and playwrights, with full descriptions. Just be warned, it’s a service provided by a company trying to sell you books and licenses to perform.