You may not have realized the benefits of being able to use tweets to find out where your Amazon delivery is, but TrackThis wants to change that. It's an app that combines more than six different APIs in order to let you track your packages over email, text message, Facebook or Twitter. It monitors your packages and when they move it sends you a message with the new location and ETA. TrackThis supports FedEx, UPS, USPS, DHL and other tracking codes.
Tangler, an online network of discussion forums, recently announced their new API. The Tangler service takes traditional discussion forums to a new level, by allowing anyone to easily set up a discussion forum that can grow to include hundreds of topics and thousands of users.