Only fangames created for the Dream Diary Jam here: https://www.backloggd.com/u/ouroborostxt/list/dream-diary-jam/
(Comment if there's any fangame currently available in the database that's missing from this list!)

Not in the database according to the games listed on the YNfg wiki (as of 28/04/2024):
• YNfgs considered prototypes, pre-alpha builds or demos (not accepted by IGDB guidelines as of 10/11/2023): Akumu no Yume, astray, Chains of Memory, Collective Unconscious, Cyphersomnia, Distant Dreams, Distant Memory, Dream Diary Quest, Dream Memories, Magenta, Märchen, Noumena, Obligatory, Of Fake Town, Old Test, Papr Wrld, Pico, Rue, Scratch Nikki, SOLITARY, StaticNikki, Tertianoumenon, We Say Random Words, Yashin Janaru, You Bound, Yume Aizakku, Yume Nikki En Scratch, Yume Nikki GB, Yume Nikki: Happiness, Yume Walky, Yuutsuna Nikki.
• YNfgs made in Roblox (not accepted by IGDB guidelines as of 19/07/2023): AERO, Before Humanity, Breeze, Day of Nights, Deep Dormancy, Dream Game, DREAM WORLD, Dreams of Bombshells, Edge of the Atmosphere, ESCAPISM AREA, Fallen of Visnse, flowers for my moon, Luminary, Other Realm, Realm of Vision, Project Somnia, Roblox: Dream Emulator, Something somewhere, sun moon and stars. to these i bid adieu, Super Dreams, SWEET DREAM, The Dream Core, The Forge and the Crucible, the single scarlet poppy in a field of stars, Tin Pot Dreams, Utopia of Unconscious, Visare, Yume Bricki.