If This Then That, ifttt.com, has always been a fascinating and useful web app that links together otherwise separate apps and creates surprisingly useful interactions. For example, you can use the app to automatically receive an email when a new craigslist post is created for a search you’re interested in.

On our mobile device IFTTT takes on a whole new dimension of usefulness as it can now add your location to the mix so that you can set your phone to automatically switch to silent when you get to the office or automatically send a text message when you leave your office.  You can browse through the community made recipes online to get a good idea of what this app can do for you.