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.

LearnQuest
Skills you'll gain: Network Troubleshooting, Hardware Troubleshooting, Network Administration, Desktop Support, Technical Support and Services, System Support, Technical Support, Help Desk Support, Cloud Services, Security Management, Computer Security Incident Management, Operating Systems, Microsoft Windows, Computer Hardware
Beginner · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: HTML and CSS, React.js, Web Applications, Front-End Web Development, Javascript, Cascading Style Sheets (CSS), Web Development, User Interface (UI)
Intermediate · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Statistical Inference, Statistical Modeling, Regression Analysis, Data Ethics, Statistical Methods, Data Science, R Programming, Data Modeling, Statistical Analysis, Predictive Modeling, Mathematical Modeling, Probability & Statistics, Model Evaluation, Feature Engineering
Build toward a degree
Intermediate · Course · 1 - 3 Months

Packt
Skills you'll gain: Root Cause Analysis, Six Sigma Methodology, Quality Management, Kaizen Methodology, Lean Methodologies, Process Improvement, Pareto Chart, Quality Control, Statistical Process Controls, Data Analysis, Corrective and Preventive Action (CAPA), Microsoft Excel, Diagram Design
Intermediate · Course · 1 - 3 Months

Imperial College London
Skills you'll gain: Continuous Quality Improvement (CQI), Healthcare Project Management, Patient Safety, Health Systems, Clinical Leadership, Patient-centered Care, Data Quality, Community Health, Risk Analysis
Mixed · Course · 1 - 4 Weeks

Infosec
Skills you'll gain: Open Web Application Security Project (OWASP), Secure Coding, Application Security, Web Applications, Javascript, Web Development, Node.JS, Security Controls, Web Servers, Hypertext Markup Language (HTML), Java Programming
Intermediate · Course · 1 - 4 Weeks

Skillshare
Skills you'll gain: Video Editing, TikTok, Storytelling, Animations, Timelines, Post-Production, Content Creation, Multimedia, Video Production, Editing, Productivity, Color Theory, Web Content Accessibility Guidelines, Typography
Beginner · Specialization · 1 - 3 Months

Skills you'll gain: Security Controls, Security Awareness, Change Control, Computer Security Awareness Training, Cybersecurity, Security Management, Data Security, Safety and Security, Cyber Security Policies, Data Ethics, Data Integrity, Identity and Access Management
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Statistical Process Controls, Statistical Hypothesis Testing, Lean Methodologies, Team Motivation, Process Improvement, Six Sigma Methodology, Kaizen Methodology, Lean Six Sigma, Process Capability, Risk Analysis, Team Leadership, Quality Improvement, Team Management, Benchmarking, Performance Measurement, Change Management, Process Analysis, Statistical Analysis, Root Cause Analysis, Regression Analysis
Intermediate · Specialization · 1 - 3 Months

Microsoft
Skills you'll gain: ASP.NET, Microsoft Copilot, .NET Framework, Application Programming Interface (API), Middleware, Server Side, Restful API, C# (Programming Language), Back-End Web Development, Application Frameworks, JSON, Software Documentation, Secure Coding, Programming Principles, Extensible Markup Language (XML)
Beginner · Course · 1 - 3 Months
LearnQuest
Skills you'll gain: Data Warehousing, Cloud Deployment, Data Analysis, Cloud Computing, Data Architecture, Big Data, Cloud Services, Analytics, Analysis, Data Storage, Cloud Infrastructure, Scalability, Data Processing, Extract, Transform, Load, Public Cloud, Software As A Service, Database Architecture and Administration, Statistical Analysis, Data Strategy, Data Integration
Beginner · Specialization · 3 - 6 Months

Illinois Tech
Skills you'll gain: Model Evaluation, Statistical Analysis, Bayesian Statistics, Data Visualization, Statistical Inference, Exploratory Data Analysis, Data Cleansing, Regression Analysis, Analytics, Data Analysis, Logistic Regression, Machine Learning, R Programming, Data Preprocessing, Statistical Modeling, Data Validation, R (Software), Data Mining, Statistical Programming, Predictive Modeling
Build toward a degree
Intermediate · Specialization · 3 - 6 Months