In 2025, Harvard CS50 offers 10 free certificate courses on topics such as computer science, Python, and AI.

Here is a guide with the best online courses to learn Software Reverse Engineering (SRE), a valuable tool for malware analysts, security researchers, and forensics investigators.

If you’re interested in learning the guitar, there’s a course for you. In this guide to the best guitar courses, there are several beginner courses to choose from, plus some specific styles to explore if you already know the basics. The guitar is a popular and versatile musical instrument. It’s portable (especially the acoustic guitar), and you can play melodies or strumming both solo and in a band. It lends itself beautifully to many musical styles, from flamenco to classical, jazz, blues, fol

In 2025, Udemy hit its first profitable year, but its Q4 2025 ended in a loss. A few days after announcing the numbers, the stock reached an all-time low. The company didn’t have an earnings call, nor did it release an investor presentation because of its pending merger with Coursera. The earnings call would have been helpful to break down the numbers, since the numbers look bleak from an investor’s perspective. The overall revenue has fallen for the first time since the company went public, a