I think the first 4 are purslane and the last 2 are portulaca.
I'm going by the leaves. I looked in the database but what I'm seeing are more blooms than leaves.
This is portulaca:
http://riversidenurseryva.com/...
This is purslane:
http://weeds.cropsci.illinois....
Do you see the difference in the leaves?
Does this help?