Description: CSS Reference is a free web-based reference for Cascading Style Sheets (CSS) covering the latest web standards. It provides a quick and interactive guide to all common CSS properties and definitions, along with examples.
Type: software
Description: Khan Academy is a free online learning platform that offers practice exercises, instructional videos, and personalized learning dashboard for K-12 and college level students. Subjects covered include math, science, economics, history, grammar, and more.
Type: software
Pricing: Free