Moszen - Moszen is a free web service that provides ambient sounds from natural environments to help you relax and avoid stress in your daily life.
Zeplin - Collaboration app for UI designers & frontend developers
Noises Online - Premium masking sounds
Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
SoliCall Pro - Removes noise & echo from any VoIP call. Can also be used for call recording.
Abstract - A secure, version-controlled hub for your design files