In my February column, I mentioned several pieces of software and Internet tools that are no cost. One of those has proven to be especially popular here with teachers and students -- the online bookmarking site del.icio.us. In many ways, it’s the poster child for what is commonly called Web 2.0 -- the social web, the read-write web. At its most basic level, del.icio.us is simple tool that can be used to store one’s bookmarked websites online. Accounts are free and one may open as many as one wishes. (Why one may wish to do this is coming up.)

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