MusOpen
MusOpen is the online repository for music in the public domain. The vast majority of the tracks are classic music with all the famous composers present in the lineup. There’s also a large collection of sheet music, as well as numerous music education resources.
Unsplash
Unsplash is, without a doubt, the poster child of the free pictures movement that has taken the internet by storm over the last several years. What started in 2013 as a Tumblr site with 10 pictures leftover from a photoshoot is today a thriving community with over 200,000 images, more daily views than The New York Times, close to 100 million downloads, and partnerships with industry giants such as Apple.
Wisdom Commons
The Wisdom Commons is a place to find and discuss information about virtues that human beings generally agree are important — like generosity, compassion and courage, and so on. This is backed up with several thousands quotes, poems, fables, essays and other similar works that are all free to use.
Got these from: https://www.sitepoint.com/creative-commons-sources/
