Udemy is a popular online course platform that allows instructors to create and sell their own courses. Instructors have complete control over the content, pricing, and marketing of their courses.

Coursera is known for its extensive catalog of free courses from top universities and institutions around the world. These courses cover a wide range of subjects, including computer science, business, social sciences, and more.

edX is an online course platform that offers interactive video lectures, quizzes, and assignments. It also provides discussion forums and peer assessment features to enhance the learning experience.

Khan Academy is renowned for its personalized learning experience. It uses adaptive learning technology to track students' progress and adjust the difficulty of the content accordingly.

Duolingo is a language learning platform that incorporates gamification elements such as badges, points, and leaderboards to make the learning process more engaging and motivating.

Zoom is a popular video conferencing platform that enables instructors to conduct live online classes. It offers features such as screen sharing, breakout rooms, and polling.

Moodle is an open-source learning management system (LMS) that offers a wide range of tools for creating and managing online courses. It is widely used by educational institutions and organizations.

Slack is a popular collaboration tool that is often used in online learning environments. It allows instructors and students to communicate and collaborate on projects and assignments.

Udemy is an online course marketplace where instructors can sell their courses and students can purchase and access them. It offers a wide range of courses on various topics.

Udacity is an online course platform that focuses on project-based learning and real-world applications. It offers courses in technology, business, and other fields.

Canvas is a learning management system (LMS) that offers a comprehensive suite of tools for creating and managing online courses. It is widely used by educational institutions and organizations.

Khan Academy is an online learning platform that uses adaptive learning technology to personalize the learning experience for each student.

Udacity is an online course platform that specializes in tech-related courses, including programming, data science, and artificial intelligence.

LinkedIn Learning is an online course platform that offers a wide range of courses on business and management topics, including leadership, communication, and project management.

Moodle is an open-source learning management system (LMS) that offers a wide range of tools for creating and managing online courses. It is widely used by educational institutions and organizations.