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

You can find the entire catalog of 40,000 online courses many of which are offered by 1000 universities around the world on Class Central’s subject page.

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Efficient HVAC Systems
Delft University of Technology via edX
Learn how to decide on efficient combinations of energy conversion systems and how to distribute and control air and energy flows in buildings whilst minimizing carbon emissions and optimizing thermal comfort in close consideration with the architect.

Speaking Skills for University Success
University of California, Irvine via Coursera
As a student in an English-speaking university, you’ll need to speak in many situations, both formal and informal, planned and spontaneous. In this course, you’ll get advice for speaking in many different situations.

How to make your professional career
St. Petersburg State Polytechnic University via Coursera
By means of this course, we would like to help young people to form their professional activity and career vision that would contribute to their professional development.

Product Management Essentials
University of Maryland, College Park via Coursera
This course investigates the framework for success in product management by defining the product manager’s position in an organization and the key responsibilities. We will examine the skills and competencies most critical to carrying out those responsibilities. To further improve your understanding of product management, we will discuss how product managers engage with the product team and stakeholders to create and manage successful products.

Fundamentals of Nanomaterials and Nanotechnology
Purdue University via edX
Learn about the application of nanomaterials in civil and environmental engineering.

Financial Management for Product Leaders
University of Maryland, College Park via Coursera
This course is for aspiring or active product leaders who wants to understand how to secure and manage funding for their activities. We will demystify key accounting and financing concepts to give product leaders a guide to developing the business case for their ideas, and securing funding to translate ideas into reality.

Introduction to Digital Marketing
University of California, Irvine via Coursera
This course will offer students a panoramic view of digital marketing and provide insights into key strategies using Internet-based platforms. In addition, it will focus on content that resonates with consumers that helps businesses differentiate themselves in competitive markets.

Excel Time Series Models for Business Forecasting
Macquarie University via Coursera
This course explores different time series business forecasting methods. The course covers a variety of business forecasting methods for different types of components present in time series data — level, trending, and seasonal.

Mental Health and Adjustment
Govt. College for Women via Swayam
The course “MENTAL HEALTH & ADJUSTMENT” is an Elective Course in B.A Honors in Education as well in B.Ed/ M.Ed under the Choice Based Credit System (CBSE). The course has been meticulously designed so that the students will have a basic understanding of the subject (e.g., factual knowledge, methods, principles, generalizations, and theories).

Market Risk Management: Frameworks & Strategies
New York Institute of Finance via Coursera
This course provides the foundation for understanding the frameworks used to develop market risk management strategies. You will identify the market risks associated with each type of financial instrument.

Human Nutrition and Biochemistry
English and Foreign Languages University via Swayam
The course deals with the various nutrients, their physiology, metabolism, source, functions, deficiency caused by insufficient intake etc it also deals with the major nutrient disorders in the country, various nutrition programmes to overcome these deficiencies etc.

Deploying Machine Learning Models in Production
deeplearning.ai via Coursera
In the fourth course of Machine Learning Engineering for Production Specialization, you will deliver deployment pipelines by productionizing, scaling, and monitoring model serving that require different infrastructure; establish procedures to mitigate model decay and performance drops; and establish best practices and apply progressive delivery techniques to maintain and monitor a continuously operating production system.

Imagery in Action
Esri via Independent
This course is for anyone who wants to learn—or learn more—about the many uses of imagery, the many types of imagery, and the rapidly growing integration of imagery with GIS. Explore cutting-edge imagery applications and advanced tools to extract information from imagery and remotely sensed data.

Urbanization and Environment
Indian Institute of Technology, Kharagpur via Swayam
With lessons from emerging urban social sciences frameworks such as urban environmental history and urban political ecology and with the empirical focus on South Asia, the course will shed light on cities as complex socio-natural-technical assemblages, encompassing elaborate technical apparatus and intricate social arrangements evolved along shifting temporal scales and development imperatives.

Introduction to Machine Learning
Purdue University via edX
Learn the basics of machine learning with hands-on practical examples on engineering applications.

Fundamentals of Data Visualization
University of Colorado Boulder via Coursera
This course explores the design, development, and evaluation of such information visualizations. By combining aspects of design, computer graphics, HCI, and data science, you will gain hands-on experience with creating visualizations, using exploratory tools, and architecting data narratives. Topics include user-centered design, web-based visualization, data cognition and perception, and design evaluation.

Word Forms and Simple Present Tense
University of California, Irvine via Coursera
In this course, “Word Forms and Simple Present Tense,” you will learn about different word forms, like nouns, proper nouns, plural forms and singular forms. You will learn when to use the articles “a” and “an.” You will also learn about the BE verb in English, how to form it and when to use it.

Frontier Physics, Future Technologies
University of York via FutureLearn
Expand your understanding of modern physics and discover how we can solve societal problems by developing future technologies.

Object-oriented programming
Higher School of Economics via Coursera
This course is primarily intended for students with basic programming knowledge who want to develop their C++ programming skills and learn about OOP in the context of C++. You will understand the advantages and features of OOP over procedural programming.

Analysis and Design of Water Distribution Systems
Purdue University via edX
Analyze and design water distribution networks and select pumps for applications.

Artificial Intelligence for Breast Cancer Detection
Johns Hopkins University via Coursera
The course intends to provide students basic understanding of artificial intelligence approaches to breast cancer detection. Students will take quizzes and participate in discussion sessions to re-enforce critical concepts conveyed in the modules.

Essentials of Management and Strategic Planning
University of California, Irvine via Coursera
Essentials of Management and Strategic Planning introduces learners to the basics of running a business and strategies for improving an organization’s growth and profitability.

Data Mining Methods
University of Colorado Boulder via Coursera
This course covers the core techniques used in data mining, including frequent pattern analysis, classification, clustering, outlier analysis, as well as mining complex data and research frontiers in the data mining field.

Designing Effective Science Communication
University of Colorado Boulder via Coursera
This course is designed for scientists, science educators, and science communicators who are interested in re-thinking how we communicate science to diverse audiences, particularly to the general public. Topics include evidence-based considerations of human learning as well as effective communication through a variety of modalities, including oral presentations, written forms of communication, technology, and artistic media.

Welding Application Technology
Indian Institute of Technology Guwahati via Swayam
As the name implies in this course I will try to cover the fundamental overview of the traditional/ industrial welding technology especially those welding processes which are widely used in manufacturing industries. I will also try to cover the detail concepts of design and analysis of welding joints, heat treatment and weld induced residual stresses & distortions and its measurement.

Mental Health and Resilience for Healthcare Workers
University of Toronto via Coursera
This course will help institutions and individuals better manage the mental health challenges of being a healthcare worker. Healthcare providers such as the University Health Network (UHN) address the mental health needs of their staff through several initiatives intended to help build resilience and to provide respite from the demands of their work.

Mathematical Methods in Physics 2
Indian Institute of Science Education and Research Bhopal via Swayam
This would be the second of a two-part series on Mathematical Methods in Physics. The aim here is to provide a solid mathematical foundation for the budding Physicist eager to climb the ladder of self-learning. This course is designed to cater to an undergraduate student who excitedly embarks on a study of Physics, but is obstructed by the mathematics which appears so forbidding.

Retail Marketing Strategy
University of Pennsylvania via Coursera
In this course, Professor Barbara Kahn will explain what it means to switch from a product-focused approach to a customer-focused approach and create marketing strategy to deliver real customer value. Learning from companies that have been most successful during this wave of change, this course will offer insights as to what we can learn from their ascendance.

Life 101: Mental and Physical Self-Care
University of California, Irvine via Coursera
This course will cover various topics that would teach students healthy lifestyle choices, the importance of mental and physical health and self-care. For each topic, an evidence-based lecture that would include scientific evidence will be presented and then students will be provided practical methods to practice what they have learned from the lectures.

Introduction to Sociology I
CEC via Swayam
This course covers the basic introduction to sociology through a wide and interesting range of topics. It is not limited to the usual topics covered in introductory courses in several places. The range makes this introduction contemporary and relevant and draws on topics relating to India and other societies. Thus, it is intended as a broad and comprehensive introduction to the discipline.

Our Mathematical Senses
Indian Institute of Technology Madras via Swayam
This course will explore how one of our senses — our sense of sight — relies on our brain’s seemingly hardwired understanding of a fascinating geometric space. What’s more, this space — known as the two dimensional Projective Plane — is fantastically unlike the Euclidean space in which we live and work.

Cloud Machine Learning Engineering and MLOps
Duke University via Coursera
Welcome to the fourth course in the Building Cloud Computing Solutions at Scale Specialization! In this course, you will build upon the Cloud computing and data engineering concepts introduced in the first three courses to apply Machine Learning Engineering to real-world projects.

Introduction to Law on Electricity
Indian Institute of Technology, Kharagpur via Swayam
The overarching reform in the Electricity sector culminated into the enactment of a new law in the year 2003. After repealing related laws, the Electricity Act, 2003 ushered a new era of reform in the sector by opening up the market for the private players and creating an autonomous regulatory body which has been entrusted with the responsibility to promote the sector and bring in efficiency by furthering the interest of the consumer.

Multilevel Modeling
Erasmus University Rotterdam via Coursera
In this course, PhD candidates will get an introduction into the theory of multilevel modelling, focusing on two level multilevel models with a ‘continuous’ response variable. In addition, participants will learn how to run basic two-level model in R.