I think it’s a Kalanchoe, looks like a blossfeldiana type.
Someone suggested the leafsnap app on another post to help identify plants. I downloaded it and was surprised at how well it did!
To me, this looks like a Swedish Ivy (Plectranthus Australis). I have one and I cannot figure out how to make it happy, and it looks like yours is pretty mature!
I agree with Lela. I’m pretty sure that it is a Swedish Ivy…