Kind of a more loosely structured WikiPedia, with fewer rules and a lot more opinion. It's probably more comparable to the original wiki wiki web, by Ward Cunningham (c2.com, which contains a little bit of everything, kinda like everything2), though it evolved in different directions. It developed more focus on creative writing and commentary over the years, with less emphasis on encyclopedia style articles or technical articles, though I haven't paid attention to it in like a decade. I was very excited about it when it first came about, though.

It was closely related to Slashdot, but when Slashdot was sold, E2 remained independent.