If you want to get a touchscreen sensor for your MacBook Air, get an AirBar. This is a unique plug-and-touch solution for your MacBook Air. What it does is pretty simple. It just makes your MacBook screen touchscreen compatible.
You can use the Sharing Debugger to see the information that is used when your website content is shared on Facebook, Messenger and other places. The Batch Invalidator will let you refresh this information for multiple URLs at the same time.