I have a pile of these ideas, but I didn't want to make individual posts for each.
1. Mass Production - Allows you to make more of something from a basic resource at a time. Perhaps separate upgrade cards for the 4 different types--Spice, Gas, Fruits, Bubbles. Perhaps different levels giving you a larger multiplier.
2. Over-a-squeezer - gives you a very small chance of squeezing a chicken into a chick or egg.
3. Bean Bagger - Bundles a stack of beans into a bag. Bags stack like bundles of grain.
4. Ore-ganizer - packs stacks of ore into stackable crates.
5. Ranger Rook - When a rook attack occurs anywhere in the world, you get a notification.
6. High Rook Roller - Your rook rolls become REAL attacks 50% of the time.
7. Currant Events - When gathering, you have a small chance of also finding some currants. Perhaps separate cards for different types of gathering.
8. Firefly Finagler - You can pull in a full jar as long as the swarm has 7 fireflies.