VGFacts

http://us.battle.net/heroes/en/blog/18538454/
http://us.battle.net/wow/en/forum/topic/16858965991
http://us.battle.net/hearthstone/en/blog...5-4-1-2015

These were some of Blizzard's April Fools "Patches". Notice any other notable April Fools jokes?

While not really a joke...

Amazon has changed their front page to 1999. This one was a shock to me.

Tumblr has made a fake business with most of the tumblr's members. They given me the name CLXcool corp.

Edit: Forgot to mention they made a copy machine icon similar to the annoying paperclip from microsoft word.

http://us.blizzard.com/en-us/bmotes/

Found another Blizz one.

http://kotaku.com/minecrafts-latest-upda...Socialflow

http://knowyourmeme.com/memes/2015-april-fools-day

Minecraft brought back the fake 2.0 update.
You can't harm anything, all the swords become hearts, you repeatedly play a Minesweeper knock-off, the Creepers are smiling, you can make a useless obsidian boat, the clouds are shaped like hearts, the world gives off a pink hue, and you can only have one world.
Oh, and the Wither becomes this:

Here's a whole slew of them:

http://www.playstationlifestyle.net/2015.../#/slide/1

This one "captured" my laughter. Thanks Overkill!

http://www.overkillsoftware.com/games/collectorpack/

http://cosplay.kotaku.com/116-cosplayers...Socialflow

Mass Misty Cosplay

Speedrun.com changed their current speedrun streams/marathons to this video. Took me by surprise a bit.