How to create Gadgets

What are Gadgets?
Gadgets are simple HTML and JavaScript applications that can be embedded in webpages and other apps.

1-from Google:
-http://code.google.com/intl/ar-QA/apis/gadgets/
-Gadgets API extensions
http://code.google.com/intl/ar-QA/apis/gadgets/docs/overview.html
2-From Microsoft
Scripting in Windows Vista
Creating Gadgets: Part 1
http://www.microsoft.com/technet/scriptcenter/topics/vista/gadgets-pt1.mspx