For many people, a little background noise is helpful to calm down and focus. In some cases, it's also a boost to productivity. Noisli is a site that allows you to create your own set of background sounds by combining clips of rain, water and wind.
Like the previously mentioned Coffitivity, Noisli is all about giving you a little background noise to help you focus. Load up the site, click the icon of the sounds you want to hear, and get to work. If the sound of fire, coffee shops or waves doesn't seem appealing, you can also just switch on some white, pink or brown noise.
Once you have your sounds chosen, Noisli matches that feeling with a coloured background as well. It's simple and doesn't take up a lot of memory in your browser to run.