Noizio - Feeling that the noise of the big city is too much for you to bear?
SoundSource - The sound control that should be built into MacOS
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.
Boom 3D - Audio enhancer with 3D surround sound
Xero - Xero is online accounting for your small business.
QuickBooks Online - QuickBooks Online is a Cloud Accounting for small business that can be used on iPad, mobile phone or computer to do invoicing, billing, run reports, or even pay employees online.