DataMask.tech - Mask private data before taking screenshots
wisaw - What I Saw Today (cool things) -- Minimalistic Anonymous Photo Sharing
ObscuraCam - Obscuracam is a photo and video app for Android that keeps certain information private.
Szoter - Szoter is easy to use, free, online image annotation tool. Annotate, draw and highlight any image.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
WallaMe - Hide messages in the real world using augmented reality