Noizio - Feeling that the noise of the big city is too much for you to bear?
Gmail Focus - A Chrome extension to focus on your email
Hipster Sound - Be productive at home with the sounds of busy cafes.
Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.
Noizer - Ambient sounds like Noisli, but free
Moodly - Get a better sense of focus and relaxation by listening to ambient nature sounds.