Fallen Down: Heartache & Compassion in Undertale
An unofficial book on Undertale, delving into the game's explorations of compassion.
Dialtone: Heartbreaker
A supplement to the Dialtone TTRPG system
Totally Bratty and Catty (Twinning/Undertale)
Mass Twinning Story based around Bratty and Catty from Undertale/Deltarune
Forgotten Memories (ao3 was down)
I word vomit my interpretation of horrortale also Sans gets romanced by a fem NB farmer
Starcrossed Eclipse
A free, digital release of Starcrossed Eclipse: A SwapDreamtale Fan Anthology.