Four Links For April 25 2011

Today's collection of interesting/useful links :

1. Photo Mechanic on sale for $60](http://www.camerabits.com/site/15th_Anniversary_Release.html) - Great price for a fantastic app (Regular price is $150.00). I use it for downloading, renaming and selecting images before moving to lightroom. Saves a ton of time. Sale goes to the end of April. (Thanks [Caryn

2. Click the Squares](http://seawitchery.tumblr.com/post/4070384205/i-started-out-clicking-strategically-and-by-the) - Make some music, visually. (Thanks to [T

3. Postcards from Google Earth that Dali would enjoy

4. Visualising iPad interaction through fingerprints - Smudges on iPad glass after using various apps. This reminds me of another piece discussing how worn down numbers on door keypads make passcodes easier to guess.