There are many free online learning resources available to help you develop new skills. Some of the most popular include Khan Academy, Coursera, edX, and Udemy. Khan Academy offers free online courses in math, science, computer programming, history, and more. Coursera and edX offer a variety of courses in business, data science, engineering, humanities, and more. Udemy provides courses in web development, photography, marketing, and more. All of these sites offer free courses, so you can learn new skills without spending any money.