Glue a magnet to the bottom of the hammer so you don't have to hold nails in your mouth while hanging pictures. MIND BLOWN
XD Design's Solar Phone Charger Sticks to Windows For Better Efficiency
Solar charger, pretty cool!
The Tag Along Solar Battery with USB port allows you to charge your phone or any gadgets. Works on an inbuilt Li-Polymer battery similar to the batteries found in mobile phones. It continually stores sunlight to the inbuilt battery when exposed to sunlight.