Earth.fm - Earth.fm is a non-profit, growing library of pure, high quality nature sounds from around the world.
Power Nap App - Best napping timer with relaxing sleep sounds
Odio - Create GIFs with live audio
Soundscape - Sync your music with the open source community
MyNoise - Custom shaped online noise machines. Many Many generic sounds
WordPress - WordPress is web software you can use to create a beautiful website or blog. We like to say that WordPress is both free and priceless at the same time.