We know that young people use their phones for messaging and texting more than anything else, but those without cell phone plans can be left out of the conversation—until they download Jott. The app is being adopted “like crazy” in middle and high schools because it requires no WiFi or data plan to send messages to friends. Any device, including iPads and iPods, within 100 feet of one another can exchange chats. Jott has gained nearly 500,000 monthly users and one million downloads after three months, almost all 13-18-year-olds. (CNN Money)