1. some kind of Sedum (high in oxalic acid, not edible)
2. looks like Watercress (edible), but I'm not sure.
3. I think it's some kind of Aquilegia, probably Aquilegia vulgaris (toxic for mammalia, but my torts eat it every now and then and are still alive). The plant on the bottom of the picture might be Geum urbanum (edible).
I think the last is Aquilegia I have it in my garden and it spreads like wildfire. Pretty flowers but going to pull it up as think I read it isn't good for torts but check with www.thetortoisetable.org.uk they'll tell you what's safe or not and which parts of plant are OK to feed.