Hi Nancy, welcome to the forum.

Your first plant looks to be Hoya carnosa, the second one is badly dehydrated but shares the same leaf venation as the carnosa so it may be the same plant. If you soak the dehydrated cutting in water with a little sugar added it will slowly rehydrate, soak until it looks good which might be overnight.
The third photo shows Dischidia ruscifolia and the last looks like Hoya kentiana. Hoya kentiana and wayetii are quite close but the leaves on your plant seem broader and less folded than many plants of wayetii, then again growing conditions play a role in leaf size/shape. Flowers will give a definite ID on the last one.

Mike

A HUGE thank you, Mike! :) I often lurk, but now that I know what I have, I'll have to participate in discussions more often!

Nancy

And I must agree with Mike on all. :) Beautiful H. kentiana/wayetii.

Carolyn

Ditto!

Jan