[kaugesaar]

A Raspberry Pi/Toggl button-board - where each button represent a client. Press it and time starts tracking in Toggl.

[danielvf]

I was planning on building something similar for my homegrown time tracking system. Then I realized that I almost always start or switch projects by going to an email from the client. I setup a hotkey to run some AppleScript that grabs the current client from the from address in the email.