BetterTouchTool is a free Mac utility that allows you to supercharge your Mac's trackpad gestures. There are literally hundreds of uses for an app like this, but I'd like to share with you one particular use case scenario that I find extremely useful.
I've set up BetterTouchTool to allow my MacBook's trackpad to quickly cycle through all of my open tabs in Safari using a simple two-finger gesture. Have a look at our full demonstration video and tutorial for all of the details.
This tutorial shows you how to use your Mac's trackpad to quickly preview a website link in a small popup Safari window.
Apple's improved Force Touch trackpad on the new 12-inch MacBook and early-2015 MacBook Pro models has pressure sensors that make possible all sorts of new interactions, among them pressure-sensitive drawing with your finger.
In OS X Yosemite, for example, you can press lightly on the trackpad for a thin stroke or harder for a thick one when marking up a Mail attachment or creating a signature for forms in Preview.
And now, a Mac application called Inklet has been refreshed with superior pressure-sensitive drawing capabilities, basically turning the Force Touch trackpad in your Mac notebook into a powerful drawing tablet.