At first I thought it was a crassula family but a Hoya is a possibility though I thought the leaves were usually darker green. Are the leaf thickness similar to the hoya you have? And I guess if you have a hoya bloom that would cinch it. Let's see what other people think.
Also, the plants you do plan to put outside should be slowly acclimated first before can stay outside. Don't know where the plants were located when you found them but be aware that if they were in store-display shade, you will need to introduce them to the light outside slowly to prevent burn. But if they were already in brite light then can move them there to start.
If put hawa and andro outside, put in shade or filtered light, not sunny. These can be raised indoors actually.
