Jokes and articles.
A few to start off with:
Duolinguo offers toilet rolls for language learning
No shit!
Or you could order a bulletproof mouse for those really tough gaming sessions:
OMG! IT’S TRUE! TRUMPY IS STILL PRESIDENT!
Nah… Just messin’ witchya! 
Got ahead and pop one of those nitro pills.
I think I shared it in on the SD before, but I’ll tell the story of the time I April Fool’s pranked myself:
Years ago on this day, I tried to prank my wife with the classic “rubber band on the kitchen sink spray nozzle handle” trick so that when you turn the tap on you get sprayed. Hours went by in which my wife had not used the kitchen sink for any reason.
SO much time went by, in fact, that I completely forgot what I had done, and went to the sink to get a glass of water. My little trick worked great-- I got soaked!
My wife laughed and laughed.
My best friend in high school was a prankster, and not just on April 1st. Eventually we lost touch with each other, and life went on.
A few years ago I happened upon his obituary. It contained a lot of humor, indicating that he’d written it before his passing. The obit was published on April 1st. To this day I have no idea whether my old friend is alive or dead (my Schrödinger’s friend).
Lock Picking Lawyer shows off his 18 inch Johnson here. The comments section has links to his past April 1 postings, including “Getting into my ex-girlfriends back door” and others.
My math classes today have three activities:
- Prove that 2=1 (and that, therefore, 1=0, so if they can get everyone on Earth to send them zero dollars, they’ll be a billionaire);
- Prove that 7 x 13 = 28
- Conduct a math trick similar to this one (with some four-digit subtraction embedded).
For the first two activities, the underlying activity is to examine the mathematical error involved (in the first case, it’s a division by zero error, and in the second, it’s an error of place value).
For the third one, I explain that as a teacher I’ve gotten very good at reading subtle facial cues from children and can tell what number they’re thinking of just from their expression. “Nah, it’s just a trick,” I finally relent. “Want me to teach it to you? What you do is – oops, look at the time, class is over, have a wonderful spring break, everybody!”
This just made my day. 
Tripler
I wish I had videos of my old “blowholes.”
Nikwax (producers or water-proofing sprays and such) has a new product:
Brian
I just posted this in another thread:
That’s not an April Fools joke! 
It’s a serious article, though apparently some people can’t conceive of the name of the planet being used seriously.
Research paper, published 31st March:
I just told this story to someone-
Except I was you and my parents were your wife. I was soaked.
Glad to hear I’m not the only one who ever did that to themselves!
This one had me totally convinced for a few minutes this morning.
I’m sad this is an April Fools joke. I’d buy one.
Ugh. It’s this kind of lame, juvenile crap that makes me hate most “pranks.” This isn’t remotely amusing.
I love this prank. His sister’s response: "'It’s a good thing he’s dead because I’d have killed him’”.
He gave his family the gift of laughter on a day as dark as his funeral. It sounds like his family shared his sense of humor.
The First Lady is quite the kidder: Jill Biden pulls off April Fools' Day prank on media, staff
Volkswagen USA announcing that it was changing its name to Voltswagen … three days early. Apparently no one told them you have to do it on April 1st. The German sense of humor is no laughing matter.