Tecnologia

Enhance Speech from Adobe | Free AI filter for cleaning up spoken audio

GeeksforGeeks | A computer science portal for geeks

Coding Games and Programming Challenges to Code Better

Codewars - Bootcamp Partnerships

DigitalOcean | Cloud Hosting for Builders

SPOJ Brasil (SPOJ)

Top Website Designers, Developers, Freelancers for Your Next Project | Topcoder

Can I use... Support tables for HTML5, CSS3, etc

cssdog.com :: Learning Cascading Style Sheet in simple and easy steps with examples. A complete reference manual for CSS2 and CSS3 properties, html, CSS, CSS Useful tips

The Ultimate CSS Reference! — SitePoint

Hands-on CSS3 - Learn CSS, HTML and Responsive Web Design with Max Design’s Russ Weakley

Learn CSS Positioning in Ten Steps: position static relative absolute float

HTML, CSS, and JavaScript Tutorials, References, and Articles | HTML Dog

Position Is Everything - Coding and Computing Tips & Tutorials. Learn & Build: CSS,JavaScript,HTML,PHP,C++ and MYSQL.

Exercism

meyerweb.com

CSS Archives

CSS Zen Garden: The Beauty of CSS Design

CSS basics - Learn web development | MDN

CSS-Tricks

reddit

Real Python Projects. Python Practice. Practity

Frontend Mentor | Front-end coding challenges using a real-life workflow

CodePen Challenges

Coderbyte | Technical Assessments & Interviews

CSSBattle

Codewell | Improve your HTML, CSS, and JavaScript skills by practicing on real design templates.

JavaScript Weekly: The JavaScript Email Newsletter

Use JSDoc: Index

Tutorial Republic - Online Web Development Tutorials