liquidlight
Sprout
I have no idea what these plants are and would love it if someone could please tell me. The last photo is a tree, I think. 

The purple is some type of Platycondon or bellflower.Here's a slightly better pic of the purple ones.
Agreed.1st is a common nightshade or similar.
3rd looks like a wide leaf plantain.
#2 is a bellflower, possibly Campanula americana. I have those growing wild on my property. DW thought they looked pretty, and transplanted some into her flower garden - BIG MISTAKE!!! They are very invasive and spread like crazy, that was a couple years ago & we are still rooting them out here & there. We did let some grow next to the foundation, where they don't threaten anything else.The purple is some type of Platycondon or bellflower.
Not PI. It does remind me of the leaf of Pointsettia.1st is a common nightshade or similar.
3rd looks like a wide leaf plantain.
4th? not sure, perhaps poison ivy, would need a different picture of the leaves.