Solaris Sky Calendar - An astronomy calendar right in your pocket
KeepSafe - Keep your entire photo library safely stored in an encrypted private cloud.
Marline - Discover weather, tides and moon, like never before
Navisens - Indoor & outdoor location without beacons, WiFi, or GPS
Lumy - Helps you track photographic times
ebblink - pick one of your images, upload and get a link back.