pretty sure the second is a mint, but idk the genus/sp. even families would be helpful on other 2 at this point...thanks

The second set of 3 photos is I believe Ruellia. Possibly
Carolina Wild Petunia (Ruellia caroliniensis)
We would need clearer photos to know for sure.

The third one I know but am drawing a blank at the moment. it happens.

It would help a great deal if you would tell us where these plants were growing -- what state? What conditions?

#4, #5, #6, #7 - I agree with flaflwrgrl, Ruellia
#8 Reminds me of Desmodium of some sort: http://garden.org/plants/searc...

From the newspaper in the picture. I would say the state is Georgia.

Desmodium rotundifolium grows there.

http://www.florafinder.com/Spe...