Here are the thirty-five most popular free online university courses and Massive Open Online Courses (MOOCS) starting in June 2021, based on Class Central learners’ activity.

You can find the entire catalog of 30,000 online courses offered by close to 1000 universities around the world on Class Central’s subject page.

If these courses don’t interest you, either browse our extensive catalog of 30,000 online courses or have a look at our thematic collections:

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To see all our compilations, visit Class Central’s Collections.

Negotiation Skills and Effective Communication
Tecnológico de Monterrey via Coursera
We start making negotiations as soon as our day begins, through all our interactions, either work, social, or family-related. But have you ever wondered how efficiently you negotiate, and whether you could be better at it? This is a straightforward opportunity to put into practice all the knowledge you have acquired, and to confirm that the negotiation process is dynamic and can always be improved.

Introduction to Software Defined Networking
Curtin University via edX
Learn and apply practical skills in Software Defined Networking for IoT applications.

Healthy Ageing: Concepts, Interventions, and Preparing for the Future
University of Birmingham via FutureLearn
Learn more about healthy ageing in this course on common health problems in older adults, with a focus on reducing frailty.

Understanding Traumatic Brain Injury (TBI)
University of Tasmania via Independent
Understanding Traumatic Brain Injury (TBI) is a Massive Open Online Course (MOOC), offering university-quality education about TBI covering the spectrum from mild concussion through to severe injury.

IELTS Listening and Speaking Sections Skills Mastery
University of California, Irvine via Coursera
Whether you have taken the IELTS test before, you will benefit from completing this course on the listening and speaking sections of the exam. The lessons in this course will improve your overall skills in both listening and speaking, and they will prepare you for every type of question in these sections of the test, increasing your chances of getting your target band scores.

Leadership and Disruption
Fundação Instituto de Administração via Coursera
This course is fully focused on developing your new leadership skills. It was developed with the best models and based on best practices in the corporate world. Its content is current and practical, and updated with the latest in remote leadership, especially after the radical and disruptive changes that the world has had since the global pandemic.

Marketing Channel Functions
Emory University via Coursera
This course is ideal for individuals who currently work in or are targeting opportunities in consulting and strategy, industrial sales and buying, marketing management, entrepreneurship and business development.

Korean for Beginners: Step 2
Saint Petersburg State University via Coursera
This course is aimed at those who have completed Korean for Beginners 1 and want to continue their exciting journey in the world of the Korean language and culture.

Sustainable Cities: Governing Urban Adaptation Under Climate Change
University of Groningen via FutureLearn
Discover expert governance strategies for preparing urban areas to face the challenges posed by climate change.

Cybersecurity for Data Science
University of Colorado Boulder via Coursera
This course aims to help anyone interested in data science understand the cybersecurity risks and the tools/techniques that can be used to mitigate those risks. We will cover the distinctions between confidentiality, integrity, and availability, introduce learners to relevant cybersecurity tools and techniques including cryptographic tools, software resources, and policies that will be essential to data science.

Cell Biology: The Cytoskeleton and Cell Cycle
Massachusetts Institute of Technology via edX
How do we know what we know about cells? Enhance your scientific thinking and data analysis skills with this in-depth adventure through cell biology.

Cloud Data Engineering
Duke University via Coursera
In this course, you will learn how to apply Data Engineering to real-world projects using the Cloud computing concepts introduced in the first two courses of this series. By the end of this course, you will be able to develop Data Engineering applications and use software development best practices to create data engineering applications.

Knowledge and Skills for Dementia Care: the SSLD Approach
University of Toronto via Coursera
This course aims to inform learners about dementia and dementia care from an SSLD perspective, including, community care, in-home support, and long-term care. This course will cover the continuum of senior services and support across different settings, including, private caregiving, community services, and institutionalized residential care.

Data Science as a Field
University of Colorado Boulder via Coursera
This course provides a general introduction to the field of Data Science. It has been designed for aspiring data scientists, content experts who work with data scientists, or anyone interested in learning about what Data Science is and what it’s used for.

Stability and Design of Structural Members
Purdue University via edX
Learn fundamental concepts of buckling analysis and design of structural members for stability concerns for beam and column elements.

Hiring Practices
University of California, Irvine via Coursera
Welcome to Hiring Practices. In this course, you will learn how to develop a strategic plan to attract, recruit and retain employees at every level, from those just entering the workforce through those at the executive level.

Black Lives Matter
Johns Hopkins University via Coursera
The #BlackLivesMatter movement is the most significant political movement in African American life in the United States in the last fifty years. BLM leaders denounced anti-black racism, white supremacy, and police brutality and reshaped how we think about gender, sexuality, social justice, economic injustice, and crime.

The Inclusive STEM Teaching Project
Boston University via edX
The Inclusive STEM Teaching Project is a 6 week course designed to advance the awareness, self-efficacy, and the ability of faculty, postdocs, and doctoral students to cultivate inclusive STEM learning environments for all their students and to develop themselves as reflective, inclusive practitioners.

Financial Markets and Instruments
Higher School of Economics via Coursera
The main objective of the course is to provide detailed and thorough understanding of how financial markets work. Having successfully completed the course, students should be able to explain the differences between various types of financial instruments, understand the role of financial institutions in different types of financial markets. The course is also aimed to develop analytical and practical skills in the area of financial markets.

Intellectual Property Law in Digital Age
Saint Petersburg State University via Coursera
A unique course will help students to get a comprehensive legal education in the field of intellectual property in a fairly short time. The objective of the course is to be as practice-oriented as possible. The course examines the main institutions of intellectual property law: copyright and related rights, patent law, trademark law, legal regulation of domains.

Sustainable Aviation: The Route to Climate-Neutral Aviation
Delft University of Technology via edX
To reduce the environmental footprint of the aviation sector we need to start a clean sky revolution. Discover the latest developments in this field – from airplane design, energy carriers, operations, to human behavior – and learn how you can play a role.

Pre-University Physics
Delft University of Technology via edX
Prepare for your technical studies by reviewing the fundamentals of physics. Become familiar with the way physics and physics-related topics are taught at university level.

People, Networks and Neighbours: Understanding Social Dynamics
University of Groningen via FutureLearn
Learn why social processes seem so unpredictable and understand better the basics of social dynamics.

Algorithms for Searching, Sorting, and Indexing
University of Colorado Boulder via Coursera
This course covers basics of algorithm design and analysis, as well as algorithms for sorting arrays, data structures such as priority queues, hash functions, and applications such as Bloom filters.

Foundations & Applications of Humanities Analytics
Santa Fe Institute via Complexity Explorer
The Foundations & Applications of Humanities Analytics course is aimed at a broad range of humanities scholars. The course aims to empower scholars in the humanities by eliminating the “black box” of computational text analysis. Participants will gain a theoretical and practical understanding of text analysis methods, and will learn how to extract content and derive meaning from digital sources, enabling new humanities scholarship.

Educational Leadership: Improving Schools through Effective Leadership
Coventry University via FutureLearn
Explore your leadership style, with the chance to grow the skills you need to be a great leader in education.

Steps in Japanese for Beginners3 Part2
Waseda University via edX
Learn how to express emotion both publicly and privately

Off the Clock: The Many Faces of Time
Universidade de São Paulo via Coursera
“Off the Clock: The Many Faces of Time” presents a transdisciplinary and transnational set of perspectives on time. This MOOC aims to expand the learners’ understanding of the many facets of time, from our human experience of the present to plants, animals, bacteria, and even art’s relationship to the passing of time.

Getting Started with CyberGIS
University of Illinois at Urbana-Champaign via Coursera
This course is intended to introduce students to CyberGIS—Geospatial Information Science and Systems (GIS)—based on advanced cyberinfrastructure as well as the state of the art in high-performance computing, big data, and cloud computing in the context of geospatial data science. Emphasis is placed on learning the cutting-edge advances of cyberGIS and its underlying geospatial data science principles.

Cooking for Busy Healthy People
Stanford University via Coursera
In this course, you’ll learn some basic recipes from a home cook and two professional chefs who prioritize healthful eating. You’ll also learn some of the fundamentals of principle-based cooking that can help you break free from the chains of having to follow recipes exactly.

Platform Business Models
Indian Institute of Management Bangalore via edX
This course provides a strategic perspective to understanding platform business models. In contrast to traditional pipeline businesses, platform business models need different treatment, both in terms of strategies and operations. This course will discuss the unique economics of platform businesses, and the specific decisions leaders in platform firms need to take.

How to Create an Online Course
University of Edinburgh via FutureLearn
Discover key skills to create engaging online learning experiences.

Contemporary Data Analysis: Survey and Best Practices
Higher School of Economics via Coursera
It is a survey course on state-of-the-art in interdisciplinary methods of data analysis, applicable to business and academia alike. Unlike other statistical courses, which focus on specific methods, this course will focus on the broader areas within statistics and data analytics.

Network Analysis
Higher School of Economics via Coursera
In this course, we divide the complex field according to the three major theoretical concepts in social relations: social selection, social influence, and community building. Models of social influence help explain why networks can affect individual behavior.

Dynamic Programming, Greedy Algorithms, and Intractability
University of Colorado Boulder via Coursera
This course covers basic algorithm design techniques such as divide and conquer, dynamic programming, and greedy algorithms. It concludes with a brief introduction to intractability (NP-completeness) and using linear/integer programming solvers for solving optimization problems.