Froala Design Blocks - 170+ free responsive design blocks based on Bootstrap 4
Motivate - Handpicked motivational videos updated daily
Webflow Flexbox UI Builder - Build flexible, responsive layouts — without writing code
Acrylic Charms by Sticker Mule - Add some charm to your life.
Antetype - Antetype - Layout aware User Interface Design - responsive and future proof.
Unixstickers by Sticker Mule - Stickers for fans of unix, software, coding and open source