Coursera is an online professional development platform that offers a wide variety of courses in almost any field imaginable, with over 2,700 courses to choose from. Coursera also offers Professional Certificates in Applied Project Management and Innovation Management and Entrepreneurship, which can be completed for a fee. edX is another popular platform that offers a range of professional certifications, including over 100 programs in fields such as data science, corporate finance, and front-end development. Alison is an affordable alternative that offers courses from top institutions like Yale and Microsoft, with many courses available for free or at a low cost. Udacity focuses on cutting-edge topics like deep learning, machine learning, and artificial intelligence, with Nanodegree programs developed in collaboration with industry partners. LinkedIn Learning offers bite-sized courses on business software and tools, as well as creative fields, with a focus on day-to-day skill-building. Skillshare presents itself as a community-driven platform that offers courses in creative fields like iPad Art: Create Robots. Codecademy is a popular platform for learning programming, web development, and data science, with personalized feedback from instructors. General Assembly offers courses in development, design, and data, with a focus on interaction with instructors and mentors. Udemy allows anyone to create and sell courses, with over 80,000 options available. Many platforms offer a range of pricing options, including free or low-cost courses, as well as premium subscription services. Ultimately, the best platform for professional development will depend on individual goals and preferences.