I've been feeling homesick living in the south, missing the fall weather from the north.
With that in mind I set out to make a very minor resource pack to give the vanilla game an autumn feel, simply this resource pack only touches the grass and tree colors to make them appear fall-like. The screenshots will literally show all the changes. This requires Mcpatcher or Optifine (Enable custom colors)
Also note the grass does not impact swamps and the foliage color doesn't touch swamp or snow biomes.
I wanted to adds other smaller adjustments, I vaguely remember you can have this falling leaves effect under trees (I don't know how to do it)
And if I was any good at editing the lightmap with mcpatcher I'd opt for a warmer lighting from torches and fire or something like that. Anyway I hope people like the pack and maybe can help with any suggestions.