SCP-649: A matchbox which causes blizzard conditions when opened. It was retrieved from a town where several people, mostly mothers who had miscarried, had disappeared. When the matchbox was closed, the disappeared people returned, claiming that "their children had forgiven them." This seems to make no sense until you read the testing logs. Roughly two hours into the test, the sounds of children laughing could be heard through the snow, and three Class-D personnel were led away into the snow by a group of small figures. All three Class-D's had children who died before adolescence.
SCP-085, a sentient drawing of a young woman. The whole article is kind of sad, but the things the researchers do for her are wonderful. In a foundation filled with stuff literally hell-bent on destroying all humans, SCP-085 comes across as one of the most heartwarming objects.
Also the way the Foundation has recorded treating her - while most safe cases are treated as scientific curiosities, left alone when not being experimented on, instead they noticed Cassy was getting depressed and started providing her with things to do, like exploring M. C. Escher pictures or building herself a car by borrowing pieces from the blueprints. A contrast to their usual spartan approach, and just because they want to keep her comfortable.
Someone asked SCP-294 to produce "something Cassy will like". It dispensed an empty cup with a drawing of a glass with a brown liquid in it. The drawing was given to Cassy, who identified it as a chocolate banana milkshake, and said that it was "delicious".
Dr. ████████ requested a copy of this third photo and a digital copy was created for her without incident. The original has been filed into SCP-404-B and the copy is framed in Dr. ████████'s office.
From the Addendum to SCP-2558-J: Rather notable considering the usual dark emphasis of the website, on a page featuring very cute kittens with a special ability.
4/28/2009, After discussion leading to a formal request, O5-██, SCP-2558-J in general, and especially SCP-2558-J-Ex, are not to be weaponized. No further requests for military testing or usage will be authorized.
682's interaction with SCP-999 is pretty adorable as well. 999 is a big cuddly blob monster which lives on candy and makes people happy merely by touching it. Okay, so it doesn't actually end up making 682 less homicidal for long and 682 refers to 999 as a "feculent little snot wad" later, but while they're actually playing together it's really cute.
It apparently even works on SCP-682...until 682 did what it does best - adapt and kill everyone. It released a wave of happiness that allowed it to gleefully break out and kill a bunch of suddenly blissful people.
999 deserves a Crowning Moment of Awesome for that; after 682 released the happiness wave, it saved as many people as it could from 682's rampage.
SCP-516, a sentient tank that shows hints of morality. A picture of it was taken with SCP-978 (a polaroid that produces an image of what the target wants to be doing). The resulting picture was the tank in a meadow beneath some trees, with birds perched on its main gun and flowers growing all over its chassis. Both weird and heartwarming at the same time.
This means that the sentient tank's deepest desire is for a world that has no need for tanks. Pretty heartwarming.
The following log is a weird combination of Moment of Awesome and Heartwarming Moment. The tank refuses to kill unarmed sapient beings, so what happens if a sapient human is strapped with C4, handcuffed to an unarmed sapient human, and ordered to approach the tank and try to blow it up?
Testing Log 516-01j
Target: Two (2) D-class personnel (D-101, D-521) handcuffed together. 2kg of C4 plastic explosive strapped to D-101, instructed to approach SCP-516 and detonate explosive. D-101 fitted with 'dead man's switch' to induce explosion if D-101 killed.
Result: As Dr. ██████ detailed instructions to D-101, SCP-516 [DATA EXPUNGED]
The tank does make an exception for traitors of its country of origin. Those, unarmed or not, get no mercy from the tank. It's a loyal tank as well.
To be specific, the story turns out to be an alien world suffering from overpopulation, economic collapse, and general environmental decay. The narrator is a scientist who is not only afraid for the future of his world, but for his own life should he not be able to find a solution. He's even about to kill himself and his mates when he hears that his colleagues finally made the artifacts function. The miracle artifacts they found? The Voyager Golden Records, and the receivers have the space-flight capabilities to reach the senders' plant easily.
It's also more hopeful than it originally appears. While humans currently suffer from the same problems, this planet is apparently about 7.7 light-years away, and if the Voyager probe has reached it, this must take place thousands of years in the future. In this case, humanity will likely have either solved its problems and be able to help, or, if we've been wiped out, all of earth's resources will be there for the taking.
Much of the test log for SCP-978, a camera that shows whatever the target wants to be doing. While there are plenty of nightmarish results, a surprising number of SCPs' desires are more straightforward — freedom, to be with those they care about, or just simple little pleasures. Meanwhile, half the pictures taken of Foundation personnel show just how human they are, Mad Scientist work aside. It's all very sweet.
A picture taken of a man and a Doberman reveals they want to play fetch.
Incident-239-B-Clef-Kondraki With no other options that would save her and maintain security the best he could, Dr. Gears put SCP-239 into a medically induced coma. As he did so, he whispered "Goodnight, and sweet dreams."
SCP-1135, a living, growing village put in place in India by the Manna Charitable Foundation for the impoverished locals that is only dangerous if someone or something tries to damage it. May very well be the first SCP that was not only specifically created for benevolent purposes, but also a success in those regards.
SCP-131 is a pair of adorable creatures that are basically little, wheeled, one-eyed, teardrop-shaped pets. They have the intelligence of a domestic cat or puppy and are even affectionately called "Eye Pods" by staff and are, generally, adorable. The heartwarming comes when a group of staff get careless while cleaning 173's cell, and, before it can attack, the two of them rush in and stare at it (it should be noted that they don't blink), saving the mens' lives. The foundation even thinks about making them 173's wardens.
In the midst of all the other craziness of the Foundation, there's SCP-1230, a sentient book that just wants to create dream worlds for people to explore and adventure in. Heads into Tearjerker territory when one of the professors enters the dreamworld, and gets so immersed in a two-hundred year-long fantasy that when he returns to the Foundation, he immediately commits suicide and SCP-1230 goes into a three-week-long bout of catatonia. But then it becomes even more heartwarming when another SCP researcher helps the entity in 1230 get through the depression and grief of what it did, and the Foundation then puts the book in a large fiction library to help it make better fantasy worlds.
The note regarding the cave paintings made bySCP-1660-7, first used as a safari target by clients of Marshall, Carter and Dark:
It is their cave paintings, however, which interest us: crude humanoid figures holding sticks and killing with them at a distance, shooting projectiles.
Then a battle with the same sticks, new figures, and the end of the killing. And the symbol copied off the new figures, the symbol in front of which they leave food in sacrifice, the symbol which they smear all over things with ash and plant pigment or claw into trees. The symbol of their gods.
Two rings, one inside the other, with three arrows pointing inward.
SCP-423, otherwise known as Fred, normally just self-inserts into any document that comes near him. When exposed to a list of D-class slated for termination, he rewrites the report to read D-class slated for release. After returning to the journal used to talk to him, he responds "Now that's just heartless." The test log notes Fred's morality.
In the story Run Away Forevurrr, SCP-542 and SCP-347 are resecured bloodlessly. They just went into a diner, ordered dinner, and waited for folks to pick them up - holding no ill will towards the Foundation, and even inviting the capture team to dine with them. The story reminds you that, the Foundation maybe a prison, but for relatively harmless sentient beings that can't fit into society like these two, it's also home.
"…We gotta go back. I don't wanna be out here… I'm tired of being cold and hungry! And unseen!"
SCP-1795, the Star Womb. This is a large number of entities that travel around the galaxy making planets for the use of their mysterious creators. One of the researchers asks for permission to try and communicate since all the planets they make seem tailor made for humanity. The entry implies that humanity are from another world, and the Star Wombs were their servants, making worlds for them until the "Pattern Screamer" wiped most of humanity out. Once contact is achieved, the Star Womb replies saying that they were making the worlds in the hopes that some people had survived, and it seems extremely joyful that humanity had indeed survived. An incomprehensibly powerful group of entities, in the SCP-verse, that want nothing more than to serve humanity is an extremely nice change of pace from the norm.
The start of Experiment Log 158 AG sounds like the typical SCP fare. Professor K.P Crow attempts to use SCP-158, a soul-removing robotic arm, to create a soul for an Artificial Human the Foundation is trying to create. It goes from horror right into Heartwarming at the end. Crow creates the composite soul he desires and dubs it "Project Zero". But when he transfers it into a body, any attempt at psych evaluation "goes out the window". At first. Then it reveals that the intelligence the new soul has created is something that exists in several planes simultaneously and is functionally invincible. Eldritch Abomination, right? Well, after some initial communication issues, Crow learns that the intelligence he has created considers him something akin to a father. Crow assures it that it will get the best treatment and body he can provide. In return, all it asks for is a name, something other than "Zero". "A name, not a number". Crow suggests it names itself whatever it likes, to which the being says it will have to think about that for a while. It is heartwarming in a weird, SCP Foundation kind of way.
The experiment log for SCP-191 has a doctor giving it a Wii game to play, only for her to accidentally snap it in half. By the time he comes back with another disc (after about two minutes), the game is up and running. When questioned, the SCP (who, by the way, is a mechanical girl who speaks through text boxes) says this:
"I looked at the ones and the zeroes and I loaded those in. I'm sorry, I know I'm not supposed to do it this way, but I didn't want you to waste a disc. Please don't be angry."
SCP-191 still seemed fearful of reprimand, even after being reassured that it was doing excellently.