The first is Nixle. Nixle is a free mass notification service that allows Emergency Service Personnel to notify you via text, email, or webpages of road closings, accidents, or other pertinent information. To sign up for Nixle, click here and click the 'sign up for free' icon.
The second service is a free app called "Mobile Patrol." This app allows citizens to select different agencies and see photos of inmates that are incarcerated in their facility, what they were charged with, and what their bond is. In addition to that service, "Mobile Patrol" also has names and photos of registered sex offenders located in your county.