Provides useful buildings and items, like the Bio Farm for growing trees. Solar Farm and Large Accumulator to make your electric setup easier. Bio Fuel section to produce organic plastic and batteries. Lots of New Wood Products, like the big electric pole, wooden pipes, dart turret. Plant trees using seedlings. Change terrain from deserts to grasslands using Fertilizer - helps trees grow better. And a lot more… Please visit the homepage on the forums for more information and feedback.
Mods introducing new content into the game.
Due to this and this bug, I changed the way powered rails work. While this should fix these bugs, it may break your setup!
Powered rails won't connect to other tracks anymore. If a powered rail is placed, it will connect only to other powered rails that a train driving over it may reach. Effectively, this means that two crossing rails or two tracks running parallel to each other without touching anywhere will be on separate networks. Here's a picture displaying what I mean: 
If you want to connect separate electric networks, you can use the Rail-to-power-connector or put in some track switches.