On Ars Technica, Tom Connor does a great job producing a taxonomy and history of rage-faces, showing how they evolved from a set of proscribed, orthodox uses on 4chan to a wider set of uses and meanings in several online communities.
Rage faces slowly migrated from 4chan into other communities. There, they gained popularity and expanded their numbers as artists introduced new faces, and particularly humorous comics went viral in their communities. Though the faces were no longer exclusive to any single forum, they stayed true to the originals in style.
More people got involved, the cartoons mutated and evolved, and like any successful species, they adapted to fit into a wide variety of habitats. "You can trace back the origins to 4chan so you can say [the faces are 4chan's] baby, but it's evolved on such a wide scale that it's gone beyond anyone's single ownership," Swanson said. "Mostly the original faces are from 4chan, but a lot of the newer faces have come out of F7U12, or other places like FunnyJunk."
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.