Thanks Fatamorgana. I'm not sure on the leaf -- my leaf looks like it has more of an "indent" at the base than either the mulberry or the basswood in the pics you linked. it actually looks more like the redbud leaf, but i think those leaves are much smaller? #2 did not smell like mint. I have left it in for now to see if it flowers. I pulled out all of #1 (commelina). I have a new pic of #6. underneath the leaves is a cluster of what looks like small flower buds developing -- does this help with an ID? Thank you!

Hi Doris, I believe your plant is Iberis sempervirens(Candytuft). Remy

It's a Mossy Saxifrage, Saxifraga x arendsii. You can make more plants by dividing the one you have. For future reference it is really helpful to have something in the picture showing the scale.

#1 could be a variety of Lamium galeobdolon #2 is Lamium maculatum #3 looks like Corydalis lutea