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.

Skills you'll gain: Responsive Web Design, Front-End Web Development, HTML and CSS, Bootstrap (Front-End Framework), Web Design, User Interface (UI), Cascading Style Sheets (CSS), Hypertext Markup Language (HTML), User Interface and User Experience (UI/UX) Design, Event-Driven Programming, Web Applications, UI Components, Web Development, Interactive Design, User Interface (UI) Design, Javascript, jQuery, User Experience Design, Web Design and Development, Animations
Intermediate · Specialization · 3 - 6 Months

Board Infinity
Skills you'll gain: Apple iOS, Apple Xcode, Swift Programming, iOS Development, Core Data (Software), Mobile Development, Secure Coding, User Interface (UI), Application Deployment, Scalability, User Interface (UI) Design, UI Components, Debugging, Data Persistence, Data Management, Model View Controller, Performance Tuning, Programming Principles, Application Programming Interface (API), Application Security
Beginner · Specialization · 1 - 3 Months

Amazon Web Services
Skills you'll gain: Amazon DynamoDB, Amazon Web Services, Database Architecture and Administration, NoSQL, Data Store, Operational Databases, Database Management, Data Storage Technologies
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Infrastructure As A Service (IaaS), Azure Active Directory, Microsoft Azure, Virtual Machines, .NET Framework, Kubernetes, Docker (Software), Cloud Development, Cloud Applications, Containerization, Microsoft SQL Servers, Application Deployment, Platform As A Service (PaaS), Microsoft Visual Studio, NoSQL, Serverless Computing, Cloud Storage, Authentications, Authorization (Computing), Scalability
Intermediate · Course · 3 - 6 Months

EDUCBA
Skills you'll gain: Scripting, Object Oriented Programming (OOP), Data Structures, Scripting Languages, Python Programming, Maintainability, Programming Principles, Development Environment, Software Installation, Virtual Environment
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Cinematography, Videography, Photo/Video Production and Technology, Storyboarding, Video Production, Creativity, Storytelling, Content Creation
Beginner · Course · 1 - 3 Months

Skills you'll gain: Event-Driven Programming, Graphics Software, Computer Graphics, Video Game Development, Computer Graphic Techniques, Development Environment, Debugging, Application Development
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Kubernetes, Cloud-Native Computing, YAML, Docker (Software), Containerization, Devops Tools, Application Deployment, Command-Line Interface, Cloud Deployment, Application Lifecycle Management, Scalability
Intermediate · Course · 1 - 3 Months

Coursera
Skills you'll gain: Web Applications, React.js, JavaScript Frameworks, Front-End Web Development, Javascript, Cascading Style Sheets (CSS)
Intermediate · Guided Project · Less Than 2 Hours

Board Infinity
Skills you'll gain: Ajax, jQuery, JSON, Extensible Markup Language (XML), Web Applications, Javascript, Web Services, Event-Driven Programming, HTML and CSS
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Rmarkdown, Plot (Graphics), Ggplot2, Statistical Visualization, Box Plots, Scatter Plots, Data Visualization, Histogram, Descriptive Statistics, Data Visualization Software, Graphing, R Programming, Data Science
Beginner · Course · 1 - 3 Months

Case Western Reserve University
Skills you'll gain: Geostatistics, Exploratory Data Analysis, Spatial Analysis, Descriptive Statistics, Box Plots, Statistical Modeling, Geospatial Information and Technology, R Programming, Plot (Graphics), Rmarkdown, Data Analysis, Data Cleansing, Statistical Methods, Simulations
Intermediate · Course · 1 - 3 Months