30 Seconds of Knowledge - Become a better developer, in every new tab.
Defonic - Create a unique sound environment at home or in the office
Random User-Agent - Automatically change the user agent after specified period of time to a randomly selected one, thus...
Noizio - Feeling that the noise of the big city is too much for you to bear?
know/how Product Managers - A weekly newsletter with 5 practical tweet-length PM tips
Noisli - Noisli is a fantastic background noise and color generator for working and relaxing. Online soothing ambient sounds like White noise, Rain and Coffee Shop.