Web Resources

Royalty Free Images

Totally Free

• https://pixabay.com
• https://www.freeimages.com/
• https://unsplash.com/
• https://www.pexels.com
• https://burst.shopify.com/

Find more:

• https://buffer.com/library/free-images

Free once you purchase

• http://istockphoto.com/ - Royalty free clip-art (although you need to purchase it).
• https://stock.adobe.com/promo/firstmonthfree (first month free)

Great Articles

• 22 Best Responsive CSS Frameworks

Widgets

• Range Sliders
• 25 Amazing CSS Range Slider Designs
• http://rangeslider.js.org
• https://codepen.io/seanstopnik/pen/CeLqA
• Bootstrap slider
• https://www.cssscript.com/responsive-touch-enabled-range-slider-in-vanilla-javascript-rangeslider/

Useful Web Sites

• Walterzorn - DHTML magic, including JavaScript Graphics
• Dream Avatar
• EPA Air Quality Database