Object Oriented Design courses can help you learn principles like encapsulation, inheritance, and polymorphism, along with design patterns such as Singleton and Factory. You can build skills in creating reusable code, improving software maintainability, and designing systems that are easier to understand and extend. Many courses introduce tools like UML for modeling, as well as programming languages such as Java and Python, which are commonly used to implement object-oriented concepts in real-world applications.

LearnQuest
Skills you'll gain: Exploratory Data Analysis, Teradata SQL, JSON, Data Integration, Advanced Analytics, Data Cleansing, Text Mining, Data Quality, Data Analysis, Statistical Analysis, Application Programming Interface (API), Database Management, Natural Language Processing
Intermediate · Course · 1 - 4 Weeks

SkillUp
Skills you'll gain: Tableau Software, Peer Review, Data Storytelling, Dashboard, Presentations, Data Cleansing, Business Intelligence, Data Visualization Software, Data Visualization, Interactive Data Visualization, Data Quality, Data Preprocessing, Data Validation, Data Manipulation, Data Analysis, Key Performance Indicators (KPIs)
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Resource Allocation, Resource Planning, Scheduling, Project Schedules, Project Management Software, Project Management, Capacity Planning, Workforce Management, Administration, Expense Management, User Accounts
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Anomaly Detection, Model Deployment, Google Cloud Platform, Cloud Deployment, Image Analysis, Predictive Analytics, Computer Vision
Beginner · Project · Less Than 2 Hours

Skills you'll gain: Unit Testing, JUnit, Integration Testing, Restful API, Test Driven Development (TDD), Software Testing, Java Programming, Hibernate (Java), Verification And Validation
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Version Control, Unity Engine, GitHub, Bitbucket, Git (Version Control System), Android Development, C# (Programming Language), Android (Operating System), Game Design, Mobile Development, Scripting, User Interface (UI), 3D Assets, Video Game Development, Animation and Game Design, User Interface (UI) Design, Computer Graphics, Application Development, Graphics Software, Animations
Beginner · Specialization · 3 - 6 Months

Skills you'll gain: Canva (Software), Graphic and Visual Design, Content Creation, Graphic Design, Social Media Marketing, Advertising
Beginner · Guided Project · Less Than 2 Hours

Skills you'll gain: Canva (Software), Animations, Graphic Design, Collaborative Software, Social Media Content, Social Media, Social Media Marketing, Social Media Strategy, Multimedia, User Accounts
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Model View Controller, GitHub, Version Control, .NET Framework, Git (Version Control System), ASP.NET, Application Frameworks, Software Configuration Management, Development Environment, Microsoft Visual Studio, Bootstrap (Front-End Framework), Microsoft Development Tools, HTML and CSS
Beginner · Course · 1 - 3 Months

DeepLearning.AI
Skills you'll gain: Agentic Workflows, LangGraph, AI Orchestration, Data Visualization, Prompt Engineering, Generative AI Agents, Model Evaluation, LLM Application, Tool Calling, Retrieval-Augmented Generation, Agentic systems, Data Validation, Generative AI, Large Language Modeling
Intermediate · Project · Less Than 2 Hours

EDUCBA
Skills you'll gain: Model View Controller, Java Platform Enterprise Edition (J2EE), Back-End Web Development, Server Side, Data Access, Apache Tomcat, Application Servers, Relational Databases, Databases, Java, Web Servers, SQL, Authentications, Web Applications, Secure Coding, Software Design Patterns, Data Persistence, Context Management
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Tableau Software, Dashboard, Data Visualization Software, Data Visualization, R Programming, Alteryx, Statistical Programming, Data Presentation, Interactive Data Visualization, Data Cleansing, Data Storytelling, Data Structures, Statistical Analysis, Workflow Management, Data Analysis, Scatter Plots, Data Preprocessing, Data Manipulation, Data Processing, Data Transformation
Intermediate · Specialization · 3 - 6 Months