OMFGDOGS
An all-time classic of the "single-page website with a GIF set to background music" genre. ("Hampsterdance-core"?) The song still periodically gets stuck in my head sometimes...
Everett Kaser Software
Personal website of a guy who's been making logic computer games since 1991. Love the retro graphics. Many of these have thousands and thousands of levels, wow. There's a lot of cool content here and it seems like he still updates it. Some of the games are also available for Android (though not iPhone :( ) -- I've been playing Honeycomb Hotel on my phone, which is kind of insane but very interesting.
The Rad Project
In 1991, Jaleco of America released an NES game called Totally Rad. It was a fairly decent late-generation platformer, but it was perhaps most memorable for its oddly relentless '80s-surfer-dude dialogue, which even at the time had started to sound dated. I played it at least once around the time of its release, but I had mostly forgotten about it until one day I happened upon a Japanese game from 1990 called Magic John.
It was Totally Rad. And yet it was not.
It turns out the iconic surfer-dude lingo of this game was a complete invention of the American translators. They also redrew a bunch of the graphics to be more Radical™. This series of pages goes through all the game text and compares the original Japanese text/graphics to the English 'tude-ified version. It's amazing. Honestly, in the end, it seems like the '80s version ended up being a lot more memorable than the original.
This is actually a link to a mirrored/rehosted version of the original page, which seems to be sadly defunct. Be sure to check the hidden hover-text on the images! See also: Kid Radd
