Hello, I recently moved, and in my new yard, several groups of this strange thick-leaved plant started to grow. Leaves are roughly 4-7 cm long, over 1 mm thick, and feel quite rubbery. The plants are about half a meter tall at the moment. It looks about ready to flower, and I can post some more pictures once it does. Thanks for your help!
If you are wondering why this doesn't look like a little creeping stonecrop, it's because it's one of the Hylotelephium types - such as 'Herbstfreude'.
Thanks! With your help and some searching it's looking much like H. spectabile, erythrostictum, telephium/telephoides. Can't wait for it to flower!