100 Cameras in 1 this is a truly great app free with 20 free picture effects or if you want the full 100 effects its £1.49. Great for creative effects including HDR.
TWIP This Week In Photo This is a must listen to podcast for all the latest in Photo gear and techniques.
Aperture Blog as a Mac user i use Aperture to manage my photos and this Blog provides excellent support and guidance for the product.
iPhoneography
iPhone is already the most popular camera for taking pictures on Facebook and now its taking the place of point and shoot cameras by professionals and amatures alike. the following sites will help you explore apps and techniques.
http://www.iphoneography.com/
http://lifeinlofi.com/
http://iphoneogenic.tumblr.
http://www.iphoneart.com/
My favourite camera app (Camera+). Get clicking and creating
DOFMaster is targeted at higher-end photographers looking to calculate depth of field in photographs on their iPhone, iPad or iPod touch.
The app is able to calculate the hyperfocal distance – that is the closest distance a lens can focus on an object while maintaining acceptable sharpness to infinity – based on the type of camera and lens combination being used.
Different sensor sizes and focal lengths will pronounce depth of field in different ways, and for landscape photographers with focus-depth window lenses, this is often an essential tool to ensure accurate manual focus is made for the sharpest and most resolute final shots.
http://tech.uk.msn.com/cameras-and-photography/articles.aspx?cp-documentid=159098321