Music:

• Scribd
• MIT music courses
• MuseScore
• Fun Music Company (teaching)
• Patreon
• Camtasia - (filming the screen)
• Screenflow
• Incredibox (beatboxing)
• Katie Wardrobe (music education)
• Sound Bible (free sounds)
• Music Scores

Freelancers:

• Harvest
• Freshbooks
• Paymo
• Freelancers U
• International Freelancers Academy

Others:

• The Talent Code