Use LABORDAY20 for 20% off anything at the idevices site. These are HomeKit – certified Bluetooth pocket sockets. They don’t integrate directly with SmartThings, but they do work with Echo, which means you could include them with ST devices in Echo groups. The outdoor pocket socket is particularly well engineered, although it’s expensive.
They have a “foundation set” which is two indoor pocket sockets and the outdoor one. Usually $189, currently on sale for $159, and the Labor Day sale applies on top of that so it ends up being $128.
I know not everyone will be interested in these, but some people may find them useful.