Which tools do you recommend us to use, in order to create/develop Web 2.0 apps??

@ the company we want to focus our innovation efforts towards the Web 2.0.

Which tools do you recommend us to use, in order to create/develop Web 2.0 apps??
MooTools


Ajax


Air


Flex


Flash


CSS


Gradients


Big text %26amp; graphics
Reply:i'll recomend


prototype.js (for utility functions)


jquery (for dynamic creation)


or u can also try


dojo toolkit,


or yahoo yui.