http://www.microsoft.com/en-us/download/details.aspx?id=38782
Microsoft Virtual Academy
http://www.microsoftvirtualacademy.com/training-courses/windows-phone-8-apps-development-jumpstart
GeekChamp
http://www.geekchamp.com/
Ebook
http://sdrv.ms/18M6d6s
SDK 8.0 **Only for Windows 8
https://dev.windowsphone.com/en-us/downloadsdk
Channel 9
http://channel9.msdn.com/Series/Building-Apps-for-Windows-Phone-8-Jump-Start/Building-Apps-for-Windows-Phone-8-Jump-Start-01a-Introducing-Windows-Phone-8-Development-Part-1
Windows Phone 7 Development for Absolute Beginners
http://channel9.msdn.com/Series/Windows-Phone-7-Development-for-Absolute-Beginners
Sample Coding
https://github.com/chriskoenig
Resources
http://thesociablegeek.com/windows-phone-resources/
Lumia App Labs
http://stephenhaunts.com/2013/05/12/training-windows-phone-8-development/
***Twitter,Facebook integration
http://indyfromoz.wordpress.com/windows-phone-7-resources/
F5 Debug
http://www.f5debug.net/tutorial/windowsphone.aspx
***Skydrive Integration
http://www.kunalpriyadarshi.com/2013/01/integrating-skydrive-in-your-windows.html
Windows Phone 7 Resources from MSDN Flash
http://spiffy.sg/developers/windows-phone-7-resources-from-msdn-flash/
Windows Phone 7 resource for developers
http://www.31a2ba2a-b718-11dc-8314-0800200c9a66.com/2010/12/wp7-windows-phone-7-resources-for.html
Top 10 Windows Phone 7 ( WP7 ) Resources
http://ghazanfaralich.wordpress.com/2011/01/13/top-10-windows-phone-7-wp7-resources/