Free. Current App Store rating: 4.5 stars
IFTTT stands for "If This Then That," meaning that if one task is performed, then another task you designate should also happen. Based on the Web service, IFTTT comes with lots of "recipes" created by the IFTTT user community and organized into topical "channels," such as "Craigslist," that can automate tasks you might perform manually. Some cool examples of things you can do automatically: Save iOS reminders to Evernote checklists, wish your Facebook friends happy birthday, backup iOS photos to Dropbox and backup iOS contacts to Google spreadsheets. Some recipes won't boost your productivity, per se, but you'll arguably save time by, for example, having Boston Celtics scores automatically fed to your mobile device.