• Windows Phone Developer Homepage (App Hub)
• Video: First Look Windows Phone 7 Hands on Demo

Windows Phone Tools

• Download the Windows Phone Developer Tools (WPDT)
• Download the WPDT October 2010 Update
• Release Notes: Windows Phone Developer Tools
• Release Notes: WPDT October 2010 Update
• Video: Understanding the Windows Phone 7 Development Tools

Marketplace

• Register for the Marketplace
• Windows Phone 7 Application Certification Requirements
• Video: Making Money with the Windows Phone Market Place

MSDN Documentation

• Windows Phone Development Homepage
• Application Platform Overview for Windows Phone
• Getting Started Guide for Developing for Windows Phone
• The Silverlight and XNA Frameworks for Windows Phone
• Windows Phone Developer Tools (WPDT)
• Application Features for Windows Phone
• Class Library Reference for Windows Phone

Useful Reference Information

• Windows Phone UI Design and Interaction Guide V2
• Designing Web Sites for Phone Browsers
• Windows Phone Design System - Codename Metro
• Design Templates for Windows Phone 7
• Application Bar Icons (C:\Program Files\Microsoft SDKs\Windows Phone\v7.0\Icons)
• Windows Phone Application Execution Model

Training Resources / Sample Code

• Code Samples for Windows Phone
  • Settings sample
  • Weather forecast sample
  • Photos sample
  • Splash screen sample
  • Mini-browser sample
  • Application bar sample
  • Location Service sample
  • Accelerometer sample
  • XNA Framework sample
  • Globalization sample
  • Reactive Extensions Location Service Emulation sample
• Get Started page on Silverlight.net
• Windows Phone 7 Developer Training Kit at Channel9
• Charles Petzold’s Programming Windows Phone 7 eBook (Free)
• Windows Phone 7 Development for Absolute Beginners

Windows Phone 7 Jump Start Training On Demand

• Introduction
• Building a Windows Phone Silverlight Application Pt 1
• Building a Windows Phone Silverlight Application Pt 2
• Building Games for the Windows Phone 7 Platform
• Building XNA Games for the Windows Phone 7 Platform Pt 1
• Building XNA Games for the Windows Phone 7 Platform Pt 2
• Advanced Application Development Pt 1
• Advanced Application Development Pt 2
• Advanced Application Development Pt 3
• Marketing Your Windows Phone 7 Application
• Working with Media
• Final Silverlight Topics and Wrap-Up

Help & Support Forums

• Windows Phone 7 Forum
• Silverlight for Windows Phone Forum
• XNA Game Studio Technologies Forum

Blogs

• Windows Phone Blog
• Windows Phone Developer Blog
• Brandon Watson's Blog
• Charlie Kindel's Blog
• Peter Torr’s Blog
• Mike Ormond's Blog
• Paul Foster's Blog

Follow on Twitter

• http://twitter.com/wp7dev
• http://twitter.com/Ckindel
• http://twitter.com/BrandonWatson
• http://twitter.com/ai
• http://twitter.com/MikeOrmond
• http://twitter.com/thebeebs
• http://twitter.com/PaulFo
• http://twitter.com/wp7dev/champs

Videos

Silverlight.net

• Get Started videos on Silverlight.net

PDC10

• Things I Wish I Knew Three Months Ago about Building Windows Phone 7 Applications
• Optimizing Performance for Silverlight Windows Phone 7 Applications
• 3-Screen Coding: Sharing code between Windows Phone, Silverlight, and .NET 
• Things You Need to Know Before Building XNA Games for Windows Phone 7 
• Real-World Analysis and Optimization of XNA Framework Games on Windows Phone 7
• Making Money with the Windows Phone Market Place

Norwegian Developer Conference

• Silverlight for Windows Phone
• Silverlight Applications for Windows Phone 7

TechEd North America Session Videos

• Windows Phone 7: A New Kind of Phone
• Overview of the Windows Phone 7 Application Platform
• Windows Phone 7 Architecture Deep Dive
• Understanding Marketplace and Making Money with Windows Phone 7 Applications
• Understanding the Windows Phone 7 Development Tools
• An In-Depth View of Building Applications for Windows Phone 7 with Microsoft Silverlight (Part 1)
• An In-Depth View of Building Applications for Windows Phone 7 with Microsoft Silverlight (Part 2)
• Microsoft Silverlight Performance on Windows Phone
• Designing and Developing for the Rich Mobile Web
• Developing Occasionally Connected Applications for Windows Phone 7
• Building Windows Phone Games with Microsoft XNA Game Studio
• Building a High Performance 3D Game for Windows Phone
• Developing Mobile Code Today that will run on Windows Phone 7 Tomorrow
• Coding4Fun: Learn Windows Phone 7 Development by Creating a Robotic T-Shirt Cannon

Windows Phone Design Days

• Ana and Miles, the Windows Phone personas (3:33)
• The Metro Design Language, the inspiration  (29:48)
• Deconstructing a Windows Phone application part 1: Controls  (17:40)
• Deconstructing a Windows Phone application part2: Animation (34:22)
• Deconstructing a Windows Phone application, part 3: Target Sizes (13:39)
• Deconstructing a Windows Phone application, part 4: Globalization (37:45)
• Deconstructing a Windows Phone application, part 6: Perceived performance  (19:45)
• Designer insights into Panorama and Pivot (32:18)
• Making Audio Sing on Windows Phone (34:26 )
• Windows Phone Voice (32:00 )
• Designer Resources: Expression Blend Overview and Roadmap (41:20 )
• Designer Resources:  Windows Phone Documentation (11:18 )
• Designer Resources: Windows Phone Design Templates (4:01 )

CodePlex Projects et al

• Windows Phone 7 Panorama & Pivot controls
• Windows Phone 7 database
• Multi-Touch Manipulation
• nRoute Framework
• FourSquare for Windows Phone 7
• Windows Phone 7 Analogue Clock
• BeeHive Game for Windows Phone 7
• Phone 7 Action Pack (Windows Phone 7)
• XNA Panoramic Menus For Windows Phone 7
• OneBusAway for Windows Phone 7
• SharePhone

Useful Blog Posts etc

• Strategies for dealing with Orientation Changes
• Simulating and Mocking Location Data in the Windows Phone 7 Emulator
• High Performance ProgressBar
• Using the Accelerometer on Windows Phone 7

Demos

• Beastware Droid Assault
• Hungry Castaway
• Crotune Tourist Application
• Air Hockey Game
• Matchingo Game
• Chess Club Game
• Scene Ztitch 1 / Scene Ztitch 2
• Stopwatch
• Towers of Hanoi Game
• BEPU Physis Engine
• Krashlander Game
• Frog Log Game
• Messy Desk Game
• MIX Application
• Jumpy Game
• DroppyPop Game
• Boss Launch 2: Zombie Attack Game
• BART Train System Application
• Frog Attack Game
• London Tube Application