Go 2 Web 2.0 is a site that indexes all Web 2.0 applications and lets you search the applications based on the task you want to complete. For example, if you wanted to edit a photo but were unsure what application you needed, just search for “photo editing” and Go 2 Web 2.0 will provide a list of all Web sites that allow you to you edit images online. Go 2 Web 2.0 has indexed over 790 Web 2.0 sites so it is quite a useful site to bookmark.
UPDATE :
Movers 2.0 is a simple website for tracking “Web 2.0″ traffic trends. The website uses Alexa data for traffic analysis.
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Bhuvana Sundaramoorthy\'s Blog 