Pirate Game is short and fun.
The paradoxes are not as fun, but this one may come in use some day.

Massively multiplayer online crowdsourced games (MMOCGs) are very smart. I’m not sure of their specific history, but one of the first to become well known was Twitch Plays Pokemon. Another popular and innovative game that is currently ongoing is The Button. A cardinal feature of MMOCGs is the complex, emergent culture that they generate.

The Katering Show is fun and different
The Wizard of Oz experiment.
Why there are 28 days in February (amazing how much amazing is all around us but we see past).
Firewatch has been smoldering for some time and hopefully will create a unique atmosphere.  The concept art is beautiful. The idea of working as a fire lookout is lovely and unfortunately, at this point, an anachronism.

We are all in the gutter, but some of us are looking at the stars.
– Lady Windermere syndrome

Harry Clarke illustration
Schwarzschild Black Hole

Child of Light is an upcoming game, soundtrack
Telescopic Text – Looking for a browser/browser addon to this effect some day
Article on record-setting caving
Vemeer as artificer
Parallax view – imagine being able to take and then view 3D images like this by tilting your phone around. A commenter from hackernews points out that instead of guessing the parallax and faking the extra data required when converting flat images to 3D, this additional information can come from the slightly varied perspectives generated by your hand shaking as you take the photo.
Half-Life speed run
How do CAT scans work? – The slices are different than you’d think
Foldscope (1) (2) – Very cool
Rent Splitter
April 27th tornado path
 

DOGE2048 is based on 2048. Check out 2048 in 4D. And now a subreddit devoted to the game.