About README
- https://github.com/matiassingers/awesome-readme
- https://gist.github.com/PurpleBooth/109311bb0361f32d87a2
About Badges
About Screenshot
- iOS: http://mockuphone.com/
- Android: https://developer.android.com/distribute/tools/promote/device-art.html
About Demo GIF
- Cross-platforms: https://ffmpeg.org/
- OS X: https://github.com/dergachev/screengif
About License
About Markdown Syntax