1. Candy Cane
2. Favia/Favite?
3. Green Star Polyps weeds so if you don't want them all over your tank keep them on an island rock. I have seen some nice back wall with all GSP and its awesome.
4. Favia/Favite?
Best I can do I don't know names though hope that helps.
Are you sure on 3? It looks like an encrusting coral when the polyps are withdrawn (is gsp encrusting?) . Had gsp before and they didn't look quite like this. (OK just googled it, seems they are encrusting and mine are not well, hope I can bring them back)