The CTR2-MIDI contains a multi-function VFO knob, programmable buttons, and a key input for CW or PTT. And it's now supported in RHR! You don't even need to use the desktop app – it works in regular old Chrome.
The CTR2-Dial is also supported.
Simply go to Tools -> Browser Devices for more info and to configure it.
The device can be ordered from KU7Q