I recently backed a project out of Barcelona called Rawlemon, which aims to produce some really beautiful-looking solar chargers. The team has already been working on this for about three years, and will have some small-scale prototypes that can be used to charge your iPhone or iPad.
The Waka Waka personal solar power station is currently seeking funding on Kickstarter. The Waka Waka Power is a personal solar power station which can power your iPhone and iPad using just the power of the sun. The Waka Waka Power has been created on the back of a previously successful Kickstarter campaign for the original Waka Waka which was a solar powered LED light.
Solar: Weather is a unique weather app for the iPhone that offers a one-of-a-kind interactive UI and experience. Instead of simply displaying the weather forecast for you, Solar: Weather will display different information based on gestures. For example, swiping up with scroll through the 24-hr forecast, swiping down will display the 3 day forecast, and swiping left/right will switch between locations. It's actually very fun to use.
Logitech has announced the Solar Keyboard Folio iPad case which is a Bluetooth keyboard and case integrated into one accessory. What's different with this particular iPad case combo is that the keyboard is powered by an indoor or outdoor light source.