Packages providing 'nature_classic'
The Dreambuilder Modpack -- Everything you could want to build with, and the tools to do it.
Adds various kinds of plants, fruit bushes, fallen trees, and a whole host of foliage and other ground cover.
A quest-based game with an end planned at some point. features more realistic crafting, tools and cooking, but also has dragons, alchemy and magic.
This combines several other mods that I consider a basic minimum starting point for worlds.