This is a bit off the beaten path, but quite interesting, and definitely right up this group’s alley.

Every day I check the apps-gone-free list to see if anything might be interesting, so I can try it first.

Today, as I’m reading the list, I saw this thing. It is not something I would want to try, but most interesting. See if you agree…

Paper Keyboard

Normally $0.99.

The front camera is used to detect your fingers.

Forget bluetooth, use paper! Just print a PDF file on paper and use it as a keyboard. How? Put your phone where marked on the paper and see the magic happen: the phone’s camera detects your fingers with state of the art algorithms. You can play games, chat with friends, send emails, write anything with the keyboard. With this version you can play some games and use the typing test, additional features may be available with in-app purchase.

• Use a piece of paper as a keyboard

The app works on letter-size and A4 paper as well!

• Several games are available in the app

Collect the letters of quotes, typing games, ball games etc.

• Built-in chat client

You can chat with your friends with the keyboard using several platforms

• Send emails directly from the app

Are you tired of typing a long email to your colleague? Use the app and the keyboard!

• Write anything and paste the text into any app

Use the paper keyboard and paste your text in any text editor to format.

• Special characters are on the keyboard as well, so you can write java, sql or any code with the app, and paste the text in the appropriate editor.