Smashing Magazine features a wide range of content. It is for developers, graphic designers, and photographers. Go there if you need tips. They have featured such articles as “Keys to Better Communication with Clients” and “Top Non-Destructive Photoshop Techniques“.
No reviews but Windows Phone app: http://www.windowsphone.com/en-sg/store/app/smashing-magazine-news/c82b7dfa-e7f0-46e2-b60b-18f849d0a071