1. Genericons: http://genericons.com/
2. Jetpack: https://wordpress.org/plugins/jetpack/ - numerous features can be added quickly in the theme from Jetpack Plugin: Tiled Galleries, Related Posts, Extra Sidebar Widgets, Widget Visibility etc..
3. Google Fonts: https://www.google.com/fonts
4. Normalize: /*! normalize.css v3.0.2 | MIT License | git.io/normalize */
6. WPForms Lite: https://wordpress.org/plugins/wpforms-lite/
* Free images used in the live demo are from Unsplash.com!