Useful Websites You Wish You Knew Earlier!

5) https://codepen.io/
CodePen is a social development environment for front-end designers and developers. It’s one of the best place to build and deploy a website, show off your work, build test cases, and find inspiration.
In this Website you can write HTML, CSS, and JavaScript and get a real-time preview. Which can be used to Show off the amazing things you build, Learn new things by tinkering, Build reduced test cases to report bugs and get help on tricky problems, Try out new technologies for the first time, Build components to later use elsewhere.
Usefulness:
When you want to make your website look better or want JavaScript to do some specific work, Just use Codepen.io and view code for awesome CSS, JavaScript and HTML for almost anything logical. Its one of the best websites for Front End developers.