Want to hunt down some useful references for an essay? Wondering which topics are popular in different Wikipedia categories? Fancy seeing Wikipedia articles represented on Google Maps? TheFullWiki, a set of Wikipedia search and mining tools, has you covered.
When you hit the main FullWiki site, it heavily promotes one of its services: identifying "citable references" by finding Wikipedia articles that are well-sourced. That's a pretty dubious practice if you are a student: while using Wikipedia to hunt down useful secondary and primary sources is a good idea, relying on a web service to create the reference itself is lazy and not very likely to improve your retention of the information. You'd be better off actually digging up the reference yourself (especially since Wikipedia often cities references that aren't online and you should check their validity anyway)
However, leaving that aside there are lots of other useful resources on the site. You can see the most popular Wikipedia articles across 13,000 categories, check out fact maps on various topics, and even take quizzes on topics (though these look somewhat variable in quality). Searching on a topic will show the resources There's major time sink potential here, but it could still be a useful bookmark.