Design – UI – UX guidelines

designguidelines.co
https://designschool.canva.com/design-elements-principles/

Little UI details
codepen.io/tyrellrummage/full/ZJPXgy

google.no/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=good+web+font+google&*

10 Beautiful Website Color Palettes That Increase Engagement:
crazyegg.com/blog/website-color-palettes/
https://design.google.com/resources/
https://www.hotjar.com/blog/2014/08/07/we-analyzed-the-homepages-of-30-successful-startups-and-here-is-what-we-learnt/

Free Vector Graphics Software
Vectr is a free graphics software used to create vector graphics easily and intuitively.
https://vectr.com/

Crazy eight design ideas
iamnotmypixels.com/how-to-use-crazy-8s-to-generate-design-ideas/

designyourway.net/blog/resources/free-stock-footage-sites-to-download-videos-from/

Free Photoshop resources:
fribbble.com

getflywheel.com/layout/tips-for-dealing-with-difficult-clients

I will over time add additional resources.