Things - Things is an easy to use task manager.
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.
Motion Firefox - All-in-one time management tool in Firefox
Noizio - Feeling that the noise of the big city is too much for you to bear?
Taskable - Using multiple work apps leads to tons of context switching, breaking flow and killing productivity.
Moodly - Get a better sense of focus and relaxation by listening to ambient nature sounds.