Coursera

• 85 Free Certificate Online Courses: Includes courses from universities such as Duke, Caltech, and Georgia Tech.
  Requires simple sign-up. Valid through May.

Udemy

• 500+ Free Online Courses: Includes courses in tech, leadership, and language.
  Requires simple sign up.

Pluralsight

• 7,000+ Free Tech Online Courses: Includes courses in programming, machine learning, and cybersecurity.
  Requires simple sign-up. Valid through April.

Nikon

• 10 Free Photography Mini-Online Courses: Includes courses on photography fundamentals from domain experts.
  Requires simple sign-up. Valid through April.

Skillshare

• 2-Month Free Trial: Includes 2,000+ online courses in tech, business, and art.
  Requires signing up with credit card or Paypal, so don’t forget to cancel in time.

FutureLearn

• 50+ Free Certificate Courses: Includes courses from King’s College, University of Edinburgh, Monash University, and more.
  Requires simple sign-up.

Rosetta Stone

• 3 Months of Free Language Learning: Includes languages such as English, Spanish, and French.
  Requires simple sign up.

Google

• 1-Month Free Trial to Google Cloud Training: Includes online courses, virtual labs, and webinars.
  Requires simple sign up. Valid through April.

Udacity

• 40% Nanodegree Discount: Valid for 40+ Nanodegrees in subjects such as AI, programming, and business analytics.
  Requires filling a survey and signing up with credit card or Paypal, so don’t forget to cancel in time.
  
  

Free Course Lists Curated by Class Central

• 100+ Free University Courses to Learn a New Language
• 500 Free Computer Science Courses from the World’s Top CS Universities
• 1400+ Coursera Courses That Are Still Completely Free