1. Looks like Virginia waterleaf. Leaves can be spotted or not. It's is a native, perennial that is somewhat deer resistant and a good plant to have in native or natural areas. Here's more info: https://www.illinoiswildflowers.info/woodland/plants/va_waterleaf.htm
2.Native Jack-in-the-pulpit. Good plant. Extremely deer resistant.
3. This is a mulberry "tree", that was either cut down or damaged. You're seeing the new growth coming up multi-stemmed. It is considered invasive, though not one of the worst offenders. If you keep it, prune it to one trunk.