The Watch House blog alerted me to a pretty neat wiki which could be useful for gamers or writers, The SuperpowerWiki.
This is simply a database of powers. No matter where it might have appeared, comics, movies, shows, books, it qualifies for a listing here. Being a wiki, Wikia in particular, anyone is welcome to sign up and add to it, correct it, and improve it in general. Each article explains what the power is and how it works, it's vulnerabilities, where they've appeared, which characters have them, and much more. I find it quite brilliant.
Here's an example of a power:
Wikia is a fantastic site to chronicle geek stuff. There are wikis for pretty much any pop culture setting. Over the last several years, many of the main databases have migrated to Wikia. Here are some of the bigger ones and my favorites, you'll notice that they're quite customizable and not just clones of each other: