zenmix.io - Ambient background sound generator
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.
Defonic - Create a unique sound environment at home or in the office
Tide - Tide is probably one of the most popular relaxing and productivity boosting platforms available over the internet.
SoundDrown - Ambient sounds to help you focus, relax, and escape
Text-Generator.io - Self Hostable OpenAI Alternative