All FLPs are FL 20.9 or higher. $ indicates a VST that isn't free

NES FLPs (require FTPlug):

The Legend of Zelda - Death Mountain
Zelda II: The Adventure of Link - In the Room

GB FLPs (require FTPlug, Chip32):

Pokemon Gold & Silver - Viridian Forest
Super Mario Land - Princess Daisy Rescued (aka Oh! Daisy)

SNES FLPs (require Chipsynth SFC $):

Final Fantasy V - Beyond the Deep Blue Sea
Super Mario World - Yoshi's Island

Original compositions:

New Super Mario Bros. OST - Forest Overworld (SpuriousOats) (requires dBlue Crusher)
Super Mario Bros. 3 OST - Lava BGM (SpuriousOats) (requires FTPlug, NES VST v1.2)

Other FLPs:

Deltarune - 13am
Deltarune - GLACEIR
Horse Race Tests - Victory! Jovial Merryment
Horse Race Tests - Victory! A Mysterious Figure
New Super Mario Bros. Wii - Forest (requires Kontakt 6 $, Roland Fantom X library $, HiDef.sf2)
Pokemon Omega Ruby & Alpha Sapphire - Drought (requires Omnisphere 2 $)
Super Mario Bros. Special (PC-88) - Ground Theme (requires ymVST)