A collection of AX related links I find useful. Most of the links are related to Dynamics AX/Axapta development. Please report any broken links to me. Thanks.

Best Practice

msdn - Best Practice AX 4.0 - A must read before doing any modifications in AX.
msdn - Best Practice AX 2009 - A must read before doing any modifications in AX.

Microsoft AX sites

msdn - Dynamics AX Development Center - Dynamics AX 4.0 and Dynamics AX 2009 SDK
Dynamics AX Community - Both technical and and non-technical

Dynamics AX forums, mailing lists and wiki's

Microsoft Dynamics AX Programming - Microsoft Business Solutions newsgroup.
Optimal Axapta development - Yahoo group.
Axapta-Knowledge-Village - Yahoo group.
Dynamics User Group - Dynamics AX forum. - Dynamics AX forum.
what?Axapta - Dynamics AX news site and forum.

Dynamics AX blogs

Axapta Knowledge Village
Arijit Basu
Brandon George
Dynamics AX Enterprise Portal
Dynamics AX Geek
Dynamics AX Performance Team
Dynamics AX Sustained Engineering
Harish Mohanbabu - Axapta MVP
Harry Deshpande
Helmut Wimmer
Ivan Kashperuk
Max Belugin
Michael Fruergaard Pontoppidan
Michał Kupczyk
Oleksandr Nazarov
Palle Agermark
Peter Villadsen
Solutions Monkey
Sven Jochimsen
Yurii Rasskazov

Axapta add-ons tools

Axapta Source Code Management - Manage customizations, task tracking and version control.
Axapta Element Logger - Log elements used. Decision tool for determining which elements to upgrade.

AX - Chinese - Dynamics AX forum. - Dynamics AX forum.

AX - Dutch - Dutch links page.

AX - German - German Dynamics AX forum.

AX - Russian - Sergey Mazurkin website - Dynamics AX MVP.

AX - Spanish - Popular Spanish Dynamics AX forum.