OS X - Option-click Sound icon in the menu bar to change sound output and/or input quickly.
Asana - Ending a task with a colon converts it into a heading. Continue typing after the colon to keep it as a task.
GitHub - When you delete a repository, it has you type the full repository name to confirm the action.
via Eric Morris
OS X - Searching in System Preferences highlights the relevant sections. The more relevant the section, the brighter the light will be.
GitHub - When looking at a GitHub Contributions streak chart, if the current streak is 0 days, the date range is “Rock - Hard Place”
/via Neil Gupta
Gigantt - When you estimate a task using free text you see a live preview of how the system is interpreting it.
/via Assaf Lavie
British Gas - iPhone app has a button to turn on the camera light when submitting a meter reading.
/via Jaik Dean