We've just launched our latest Kickstarter: Arcane Lock!
It's a collection of over 200 riddles for D&D, Pathfinder, Shadowdark, or whatever else you happen to be playing.

Back it here!
https://www.kickstarter.com/projects/amarik/arcane-lock

As a side note, we're always open for suggestions, so if you see something on the Kickstarter you think we can improve, please, let us know!