Bonnie is able to do it for Caroline and Elena.
The Salvatores rings were spelled possibly by Emily for them under the request of Katherine. I can't remember but I'm sure that someone here will correct that one.
In the Originals Davina has learned how to do it and has made one for Josh.
The current crew all have one but Alaric will be without unless they can get Liv and Luke back to do one for him. Since they are the reason Damon at least was unable to come through they could try and settle some old wounds with a daylight ring.
They have to be Lapis Lazuli and are individual so you can't put someone else's on and use it.
That's all I can remember about the daylight rings off the top of my head.