AUs:

[Javatale/Lostplates] {Owned}
Handplates but a couple small changes. Sans and Papyrus both pushed Gaster into the core. Not only that, Sans remembered him while Papyrus didn't. The two of them together though, slowly became stronger and stronger.

[Frosttale] {Co-Owned}
The world is in another snowball earth phase and monsters and humans are slowly dying off.

[Atomictale] {Co-Owned}
A nuclear fallout killed most humans on the surface and mutated most monsters in the underground. All monsters are radioactively poisoned now, meaning they are slowly dying. Sans and Papyrus included.

[Ancienttale: Destruction] {Owned}
The game I am currently making. Will not spoil Anything.

[Underweb: A Web of Lies] {Co-Owned}
Webcomic I am making currently. Will not spoil Anything.

[Undertale: Story Extended] {Owned}
The Original Undertale lore with my own extensions such as more characters, easter egg character explainations, more lore, a basic timeline and a few more things. WD Optima, Cyclone and Enigma are all from this AU.

[Data Online] {Owned}
Undertale but the characters are replaced with me and my friends OCs.

[The True Lab Tapes] {Owned}
Analog Sans AU.

[Alternativetale] {Owned}
Webcomic I was making but will be worked on later. Will not spoil anything still.

[Betatale] {Owned}
Similar to Alphatale but it has different people.

[Underswap: Fate] {Owned}
Underswap game I might make in the future. Not sure though.

[LostPlates: Mental Anguish] {Owned}
[Warning: This AU is very dark. Read at your own risk. Don't say I didn't warn you.]

Lost!Sans is abused by Papyrus in this AU. Papyrus actually puts a hole in his skull for not listening to him. Sans is chained to the wall in his room. Papyrus also stripped him off his magic. Papyrus is confronted by Undyne and when Undyne goes to investigate, Sans kills Papyrus using a metal bat, giving him his magic back. Lost!Sans is a very angry individual and has Haphephobia.

[Javaswap] {Owned}
Simply Javatale but swapped.

[Javashift] {Owned}
Simply Javatale but shifted.

[Haunttale] {Owned}
Undertale but all the characters have designs based on famous horror characters. Mostly from American 1950s Films.

[Savetale] {Owned}
Undertale but Monsters can use Determination like the player can. But instead of having infinite retries, they only have 3 until they die completely. Sans in this AU has Determination.

[Undertale: False Truth] {Owned}
This AU is a mixture of Dusttale and Insanitytale with some minor changes and some major changes.

[Underlab] {Owned}
Normal Undertale but Sans decided to pass up the offer of being the Royal Judge and instead takes The Royal Scientist position.

[Agonytale] {Owned}
Dusttale but Sans was stopped by King Asgore.

[Alumnitale] {Co-Owned}
Everyone in this universe has some kind of elemental power. Sans and Papyrus have Fire as their power. Sans however, has Soul Fire which is blue. The roles are the same as usual.

[Shardtale: ECHO] {Owned}
Monsters are banished to a haunted forest outside of the Human City. Monsters seem to adapt decently well but their population is starting to dwindle. Papyrus being the Judge and previous Royal Scientist takes it into his own hands to invent a cure. This cure he named the ECHO. This cure managed to help the monsters live in the harsh conditions. Afterwards, Papyrus and his brother Sans would continue living outside the Catacombs in Snowdin. A frostbitten town.

[Overlawn: Last Mercy] {Owned}
We don't speak of this.

(These are all that I could remember as of currently.)