bugmenot.com - throwaway accounts for websites that require registration

gethuman.com - the express route to talking to a human being when calling a company

rentometer.com - Find the rents of nearby appartments

rome2rio.com - how to travel between almost any two addresses in the world

Hyperphysics - Makes physics understandable, and maps it out as a tree of concepts

reviewmeta.com - Screen Amazon products for fake reviews

music-map.com - Put in an artist, and get a neat chart of related artists