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.

Nanjing University
Skills you'll gain: Socioeconomics, Economics, Policy, and Social Studies, Economics, European History, World History, Social Sciences, Social Justice, Political Sciences, Sociology, Liberal Arts, Economic Development, Environmental Issue
Mixed · Course · 1 - 3 Months

University of California, Davis
Skills you'll gain: Chemical Engineering, Hazard Analysis, Safety Assurance, Process Engineering, Engineering Analysis, Environmental Engineering, Process Modeling, Predictive Modeling, Engineering Calculations, Mathematical Modeling, Estimation
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Cash Flows, Income Statement, Financial Analysis, Financial Accounting, Revenue Recognition, Generally Accepted Accounting Principles (GAAP)
Mixed · Course · 1 - 3 Months

Skills you'll gain: React.js, Continuous Deployment, Application Deployment, Cloud Deployment, Web Applications, UI Components, Javascript, Bootstrap (Front-End Framework), JavaScript Frameworks, Development Environment, User Interface (UI), Cascading Style Sheets (CSS), Application Programming Interface (API)
Beginner · Course · 1 - 3 Months

O.P. Jindal Global University
Skills you'll gain: Computational Logic, Machine Learning Algorithms, Classification Algorithms, Natural Language Processing, Artificial Intelligence, Agentic systems, AI literacy, Machine Learning Methods, Machine Learning, Artificial Intelligence and Machine Learning (AI/ML), Decision Support Systems, Bayesian Network, Complex Problem Solving, Probability & Statistics, Algorithms
Build toward a degree
Mixed · Course · 3 - 6 Months

University of Colorado System
Skills you'll gain: Marketing Analytics, Data-Driven Marketing, Probability & Statistics, Regression Analysis, Data-Driven Decision-Making, Data Ethics, Statistical Analysis, Statistical Hypothesis Testing, Customer Insights, Analytical Skills, Customer Analysis, Customer Retention, Correlation Analysis, Descriptive Statistics, Data Analysis, Analytics, Statistical Visualization, Statistical Modeling, Predictive Analytics, Descriptive Analytics
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Sampling (Statistics), Plot (Graphics), Statistical Methods, Descriptive Statistics, Statistical Visualization, Data Import/Export, Pareto Chart, Histogram, Statistical Programming, Descriptive Analytics, Statistical Analysis, R (Software), Box Plots, R Programming, Data Synthesis, Probability Distribution, Probability & Statistics, Exploratory Data Analysis, Statistics, Data Science
Beginner · Guided Project · Less Than 2 Hours

LearnQuest
Skills you'll gain: Angular, Cascading Style Sheets (CSS), JavaScript Frameworks, Application Frameworks, UI Components, HTML and CSS, Front-End Web Development, TypeScript, Web Applications, Hypertext Markup Language (HTML), Web Development, Development Environment
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: GitHub, Git (Version Control System), Version Control, Unix Shell, Software Versioning, Linux Commands, Command-Line Interface, Software Configuration Management, Bash (Scripting Language), Devops Tools, Software Installation, Configuration Management, Collaborative Software, Code Review, File Systems, Development Environment, File Management, Web Presence, System Configuration, Software Documentation
Intermediate · Specialization · 3 - 6 Months

Johns Hopkins University
Skills you'll gain: Tidyverse (R Package), Data Wrangling, R (Software), Data Transformation, Data Manipulation, R Programming, Data Science, Exploratory Data Analysis, Data Analysis, Data Management, File Management, Data Visualization, Data Import/Export
Beginner · Course · 1 - 3 Months
Skills you'll gain: Software Quality Assurance, Quality Assurance, Test Automation, Software Quality (SQA/SQC), Test Tools, Agile Software Development, Agile Product Development, Software Testing, Agile Methodology, Automation, Analysis, Collaboration
Intermediate · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: Distributed Denial-Of-Service (DDoS) Attacks, Cryptography, Vulnerability Scanning, Kubernetes, Cloud Infrastructure, Cyber Security Strategy, Email Security, Virtualization, SQL
Intermediate · Course · 1 - 4 Weeks