Tip provides useful info at your fingertip. You can select the text and hit the shortcut to activate the tooltip.
"Useful info" is programmed by you using your fav programming language, and it works with every Mac app.
For me, who is prone to Repetitive Strain Injury (RSI), Tip reduces hand movement and the risk of the injury.
Id love for you to try it.
Talk to me on Twitter: @tanin (https://twitter.com/tanin)