[geerlingguy]

Not sure about power on/off—you'd have to hack together a solution for that separately, but I've had good luck with an IR dongle like the Flirc USB: https://flirc.tv/products/flirc-usb-receiver

[diggernet]

Yep, those are pretty nice. It's on/off that's really hard to find. Discrete on, specifically, since with Flirc you can handle off in software.