XKCD

The ultimate in geek humour, XKCD has been making jokes about PERL programming language, Cory Doctorow and heartbreak since 2005. It describes itself as a “webcomic of romance, sarcasm, math and language”, suffers from something of an obsession with the velociraptors out of Jurassic Park, and may be the only cartoon in the world that features The Grim Reaper playing Dungeons & Dragons against Gary Gygax (“RIP, Gary”).

A series of one-off comics or short story arcs, drawn with generic stick-figure characters (one of whom, distinguished from the others with a black hat, appears to be a diabolical genius), it started when Mr Randall scanned in the doodles from his college exercise books, put them online and got a positive response. Now his site pulls in over 60 million page views a month (as of October 2007).