Color
- https://palettte.app/
- http://www.flatuicolorpicker.com/
- https://webaim.org/resources/contrastchecker/
- WCAG – check the color contrast of your app or site
Typography
- https://beautifuldingbats.com/hey-howd-you-do-that/
- Generate fancy text that works in social media posts, bios, instant messages, browser tabs, and lots more.
Images, Icons, Photography, Stock Art
- https://www.autodraw.com/
- Machine learning attempts to recognize what the user is drawing and provides a selection of related clipart
- https://unsplash.com/
- Free photography
- https://www.pexels.com/
- Free photography
- https://uifaces.co/
- Free avatars for mockups
- https://stocksnap.io/
Sketch Plugins
- https://gumroad.com/l/uifaces
- Generate avatars in your project without leaving Sketch with just one click.
Storyboard
User Flows & Sitemap
Flowchart
Mindmapping
Presentations