I'd recommend checking the Sci-Fi and Fantasy section of the site, but I can recommend a series and a storygame. The Homo Perfectus series features superpowers, and is quite good if you're into sci-fi. I recommend you start at the
first installation. It's made by a talented author and the whole series hooked me for a few days. Not sure if you're a kid, so have this story about
The Avengers made by Briar_Rose.