Where to find modern plays on the internet I can print and read?

I’ve got a group that reads plays occasionally. I’d like to find a source of plays that we can print without violating copyright laws.

I know about Guttenberg.org. So most anything that’s not in current copyright I can get.

But I’m wondering if there’s not a collection of modern works that have had the rights made public – at least for printing if not for performance.