Dzone: Developer-focused social bookmarking community

We came across dzone.com recently, a developer-focused social bookmarking site that has gained considerable popularity in the programming community. With "fresh links for developers" as a mantra, dzone leverages its users to highlight useful resources, tips and code-related news. You can read posts from the three founders at the dzone blog or click on popular links to see what’s hot now and in the past.