When it comes to tech blogs, Engadget is one of the most respected and influential. There are actually a number of blogs in the Engadget stable covering seven different languages. The English ones include the main site, Engadget Mobile, Engadget HD and Engadget Alt. Since it was launched 10 years ago, Engadget has been updated daily and continues to covers a lot more than just ‘gadgets’; it gives a broad overview of technology industry news, including social media. Recently, on the occasion of the blog’s 10th Anniversary, Engadget published this excellent infographic to summarize 10 years of social media.