First addition is the great NearbyGamers, where you can enter tags and it locates other nearby people who share tags with you. Also supports card and board games. Useful if you don’t live in Finland or some similar distant wasteland. If you do, marginally useful.
Second is Abulafia, a random generator wiki where you can add new generators and improve the existing ones. It has several name generators, plot generators, and more. An excellent resource and toy.