WIKIS AND INFODUMPS
A wiki entirely dedicated to cataloguing the cut content hidden inside hundreds of games classic to modern. Look up your favorite games and you'll be surprised what you might learn. My favorite pages are those of the Humongous Entertainment point-and-click adventure games, which as it turns out contain a lot more crude jokes on the disc than you'd expect from edutainment games.
A wiki all about fanworks from fanfiction to fangames and everything in between. Additionally a great deal of the articles on this wiki date pretty far back into the history of fandom, even referencing pre-internet fan zines for Star Trek and the like. It still has a long way to go but you should contribute if you've got a story from your corner of the web.
A library and information resource entirely dedicated to alterhuman / otherkin / therian identities and perspectives. I really urge you to take a look at this site first if you want to understand the subculture, even if you're not personally invested.
I love the LMW for the same reason I love mods and fangames. Is there a hobby more emblematic of internet culture than collectively working towards a greater project of devotion for an intellectual property you hold no ownership of? Perhaps its a sign of the times. But the active contributors of the Lost Media Wiki are a hardworking bunch, and I love checking the website every now and then to see what they've recovered. It is most certainly more about the stories of the trials hunters go through to recover these relics, than about the contents of the discoveries themselves.
If you know you know! A highly informative HR wiki and also an endless library of weird and uncomfortable 'trip reports'. Must read for any newcomer psychonauts.
You can find a lot of interesting links to smaller art projects here which is fun
Very comprehensive resource for understanding security in a world of mass surveillance