Noizer - Ambient sounds like Noisli, but free
Tagsdock - Tag Instagram photos instantly from your iOS keyboard.
Defonic - Create a unique sound environment at home or in the office
Hashtagger - Hashtagger is an exciting platform that allows you to generate popular hashtags for Instagram.
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.
Friski - Search your Instagram posts