Everything2 or E2 is a website. It lets people make pages about many different things, and some people use it as a diary.
E2 users create pages called nodes and add stuff in writeups. Only logged-in users can create writeups. Only the person who created the writeup or someone who the website owners (called "gods") choose can edit the writeup. On the other hand, on Wikipedia, anyone can edit pages, but on Everything2 only those who can edit the writeup can edit pages.