I'm not the only one out there writing riddles. If mine are too easy, or you've given up, check out these others.
The Stone: The most difficult I have found. Pay-to-play, but probably worth it. Contains a real-world twist, as well. *Update*: Sadly, The Stone is no more.
NotPron: One of the firsts. Every level is a photograph. Feels like a murder mystery.
Weffriddles: It gave me some of my ideas. Worth your time.
