Google Hacks is a compilation of carefully crafted Google searches that expose novel functionality from Google's search and map services. For example, you can use it to view a timeline of your search results, view a map, search for music, search for books, and perform many other specific kinds of searches.
InkTank is an online library system designed to archive fan fiction, stories written using an already-imagined world. It has many features tailored for such, including the ability to categorize stories by characters, genres, and "pairings". It also includes an awards system for highlighting outstanding works.