Free Resources and Inspiration for Mobile Development (and not only)

Mostly CC or royalty free.

Sounds

• http://freesound.org
• http://incompetech.com/music/
• http://chillhoprecords.com/license/

Icons

• http://iconstore.co
• http://thenounproject.com

Color palettes and schemes

• http://colourco.de

Free Fonts

• http://katydecorah.com/font-library
• http://www.dafont.com

Free Stock Photos

• http://unsplash.com
• http://stocksnap.io
• http://magdeleine.co
• http://isorepublic.com
• https://visualhunt.com (Free for commercial use 350K+ Photos)

Free Videos

• http://www.coverr.co
• http://videos.pexels.com

Coding & Testing

• A lot of UI/UX experiments on Android, with code on GitHub
• UX testing. You can earn points that you can spend on testing for your projects by working for the community.

Collections

• https://resourcecards.com Collection of everything for UI design
• http://uxarchive.com
• http://pttrns.com
• http://capptivate.co Animated collection of UI Interfaces, combined by patterns (e.g. Infographics) and visual effects (Blur, Parallax)
• http://uimovement.com
• http://www.materialup.com

Mockups & Prototyping

• http://dunnnk.com
• http://mockuphone.com
• Free collaborate prototype designing tool (powered by Google) App is free, but cloud costs money.

Mostly Free Datasets

• Awesome Public Datasets

Machine / Deep Learning Resources

• Machine Learning for iOS