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Type as you walk. This app displays a transparent viewport of what is directly in front of you so that you can avoid obstacles. It works with any app that accepts text input.
This dock and light gradually wakes you up with light to simulate dawn breaking. It also has a dusk setting to help you drift gently off to sleep.
Turn your iPhone 4 into a DSLR using real SLR lenses. Mount your Canon EOS or Nikon SLR lenses to your iPhone using this SLR mount adapter.