Being a website designer I use what tools to enhance creativity, speed, and effectiveness. Anymore Javascript is active on majority of PC's, ideas like AJAX are now the norm. I like to be an expert at the programming if possible - this normally does not happen becasue I shift gears often and wear many hats. I am shopping/ looking for the best tools for dynamic AJAX ideas and need to find out what tools people are using that fit my criteria (enhance creativity, speed, and effectiveness). Open source is a must - if you charge money for a tool then it better be great -worth the money. I am looking at using some of the Yui library; I would like to get feed back on others use and similar tools that I should also consider. In particular I have been playing with Yui's TreeView menu builder. I think this is direction companies like Yahoo need to consider seriously - speak to the web designer community and become the standard.