Core Java courses can help you learn object-oriented programming, exception handling, multithreading, and Java Collections. You can build skills in writing efficient algorithms, debugging code, and developing user interfaces. Many courses introduce tools like Eclipse and IntelliJ IDEA, which are commonly used for coding and testing Java applications, along with frameworks such as Spring and Hibernate that facilitate web development and database management.

University of Geneva
Skills you'll gain: Water Resources, Diplomacy, Water Sustainability, Water Resource Management, Hydrology, International Relations, Mediation, Arbitration, Conflict Management, Sustainable Development, Discussion Facilitation, Negotiation, Adjudication, Political Sciences, Governance, Environmental Laws, Data Collection
★ 4.9 (48) · Intermediate · Course · 1 - 3 Months

Erasmus University Rotterdam
Skills you'll gain: R Programming, Statistical Modeling, Statistical Methods, Regression Analysis, Correlation Analysis, Statistical Analysis, R (Software), Data Preprocessing, Mathematical Modeling, Model Evaluation
★ 3.9 (21) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Data Import/Export, Data Storage
★ 5 (20) · Intermediate · Course · 1 - 3 Months

Alibaba Cloud Academy
Skills you'll gain: Relational Databases, Load Balancing, Cloud Management, Cloud Computing, Cloud Hosting, Databases, Database Management, Cloud Infrastructure, Cloud Platforms, Cloud Services, Cloud Computing Architecture, Public Cloud, Cloud Solutions, Cloud Security, Data Security, Servers, Cloud Deployment, Cloud Storage, Web Servers, Data Storage
★ 4.7 (101) · Beginner · Course · 1 - 3 Months

Skills you'll gain: QuickBooks (Accounting Software), Vendor Management, Inventory and Warehousing, Accounting Software, Business Reporting, Customer Data Management, Management Reporting, Financial Analysis, Billing & Invoicing, Sales Management, Balancing (Ledger/Billing), Financial Reporting, Expense Management, Financial Acumen, Payroll, Billing, Financial Statement Analysis, Cash Management, Cash Flow Forecasting, Payroll Administration
★ 4.2 (64) · Beginner · Course · 1 - 3 Months

American Psychological Association
Skills you'll gain: Qualitative Research, Interviewing Skills, Research Methodologies, Case Studies, Data Collection, Research, Analytical Skills, Psychology
★ 4.6 (19) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Responsible AI, Microsoft Azure, Artificial Intelligence, Data Ethics, Image Analysis, Natural Language Processing, Computer Vision, AI literacy, AI Security, Applied Machine Learning, AI Workflows, Model Deployment, Machine Learning, Analytics
★ 4.5 (41) · Beginner · Course · 1 - 4 Weeks

Simplilearn
Skills you'll gain: Object Oriented Programming (OOP), Object Oriented Design, Programming Principles, Computational Thinking, Code Reusability, Application Development, Python Programming, Computer Programming, Development Environment, Computational Logic, Integrated Development Environments, System Software, Software Installation, Functional Design
★ 3.6 (14) · Beginner · Course · 1 - 4 Weeks

Illinois Tech
Skills you'll gain: Product Lifecycle Management, Product Strategy, Innovation, Global Marketing, Business Strategy, Market Analysis, Market Opportunities, Competitive Analysis, Technology Strategies, Growth Strategies, New Business Development, Strategic Thinking, Corporate Strategy, Market Dynamics, Target Market
★ 4.8 (51) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Graph Theory, Data Structures, Algorithms, Computer Programming, Python Programming, Programming Principles, Computational Thinking, Data Science, Theoretical Computer Science, Data Processing, Geometry, Data Analysis Expressions (DAX), Data Manipulation, Data Analysis, Data Management, Applied Mathematics
Intermediate · Specialization · 3 - 6 Months

SkillsBooster Academy
Skills you'll gain: Microsoft Copilot, Prompt Engineering, Vibe coding, GitHub, AI Workflows, Generative AI Agents, Software Development Tools, Application Development, Software Development, Responsible AI, Code Review, Generative AI, Artificial Intelligence, AI Personalization, Design Software, Software Engineering, Web Development, React.js, Front-End Web Development, Javascript
★ 4.5 (13) · Beginner · Course · 1 - 3 Months

University of Colorado Boulder
Skills you'll gain: Sampling (Statistics), R (Software), Statistical Inference, Probability Distribution, R Programming, Statistical Hypothesis Testing, Descriptive Statistics, Statistical Methods, Probability & Statistics, Statistical Software, Data Science, Statistics, Data Analysis, Statistical Analysis, Probability, Data Literacy, Statistical Visualization, Data Manipulation
★ 4.7 (35) · Beginner · Course · 1 - 3 Months