Contents, modules and code snippets used here are free to access on the internet, even for commercial purposes.
- Loading.io — https://loading.io/icon/
- freeSFX sounds — http://www.freesfx.co.uk/
- Fugue icon set — http://p.yusukekamiyamane.com/
- EmojiOne — https://www.emojione.com/
- Licensed icon sets and images
- Other materials and codes that can aslo be used for commercial purposes