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.

LearnKartS
Skills you'll gain: Salesforce Development, Salesforce, User Accounts, User Provisioning, No-Code Development, Customer Relationship Management (CRM) Software, Application Development, Application Design, User Interface (UI), Cloud Technologies
★ 4.9 (8) · Beginner · Course · 1 - 4 Weeks

University of Glasgow
Skills you'll gain: Business Writing, Business Correspondence, Writing, Report Writing, Business Communication, Writing and Editing, Storytelling, Organizational Structure, Vocabulary, Business Reporting, Grammar, Concision, Target Audience, Press Releases
★ 4.9 (7) · Intermediate · Course · 1 - 3 Months

University of Colorado System
Skills you'll gain: Distributed Denial-Of-Service (DDoS) Attacks, Intrusion Detection and Prevention, Security Controls, Malware Protection, Security Engineering, Network Security, Security Testing, Threat Detection, Firewall, Digital Forensics, Anomaly Detection, Code Review, Network Routing, Proxy Servers, Linux, Internet Of Things
★ 4.5 (174) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Construction Engineering, Building Codes, Engineering, Scientific, and Technical Instruments, Structural Engineering, Structural Analysis, Engineering Analysis, Construction, Engineering Calculations, Simulation and Simulation Software, Finite Element Methods, Civil Engineering, Construction Management, Mathematical Software, Engineering Practices, Environmental Monitoring, Safety Standards, Civil and Architectural Engineering, Failure Analysis, Engineering Design Process, Laboratory Testing
★ 4.4 (10) · Advanced · Specialization · 3 - 6 Months

Skills you'll gain: Email Marketing, Content Strategy, Content Marketing, Content Performance Analysis, Content Development and Management, HubSpot CRM, Marketing Strategies, Content Optimization, Data-Driven Marketing, Web Content, Social Media Content, Paid media, Email Automation, Marketing Effectiveness, Target Audience, Customer Relationship Management (CRM) Software, Marketing Planning, Marketing, Digital Marketing, Customer Relationship Management
★ 4.5 (41) · Beginner · Specialization · 1 - 3 Months

Coursera
Skills you'll gain: Project Management Software, Workflow Management, Real Time Data, Timelines, Kanban Principles, Database Software, Data Integration, Project Management, Database Design, Scheduling, Data Sharing, Leadership, Problem Solving
★ 3.9 (34) · Beginner · Guided Project · Less Than 2 Hours

Exploratorium
Skills you'll gain: Collaboration, Course Development, Creativity, Design Strategies, Mechanics, Research, Creative Problem-Solving, Experimentation, Mechanical Design, Aesthetics, Construction
★ 4.8 (27) · Beginner · Course · 1 - 3 Months

Microsoft
Skills you'll gain: Responsible AI, Containerization, Scalability, Docker (Software), AI Orchestration, Application Deployment, Kubernetes, Azure Active Directory, AI Integrations, System Monitoring, AI Workflows, Agentic systems, Artificial Intelligence, Microsoft 365, Generative AI Agents, Enterprise Architecture, Microsoft Azure, Agentic Workflows, AI Security, Enterprise Security
★ 4 (6) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Application Security, Secure Coding, Threat Modeling, Security Testing, Software Development Life Cycle, Systems Development Life Cycle, Security Controls, Security Architecture Review, Risk Management Framework, Security Engineering, Computer Security, Software Testing, Security Requirements Analysis, Security Management, Software Development, Authorization (Computing), Data Security, Identity and Access Management, Software Architecture, Software Design
★ 4.3 (6) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Model Optimization, Image Analysis, Transfer Learning, Risking, Fine-tuning, Multimodal Prompts, Model Evaluation, Technical Documentation, Data Preprocessing, Debugging, Computer Vision, PyTorch (Machine Learning Library), Feature Engineering, Tensorflow, Model Training, Embeddings, Systems Design, Ethical Standards And Conduct, Root Cause Analysis, Deep Learning
Intermediate · Specialization · 3 - 6 Months

Board Infinity
★ 4.7 (23) · Beginner · Course · 1 - 4 Weeks

University of Toronto
Skills you'll gain: iOS Development, Apple iOS, Swift Programming, Mobile Development, Animations, Application Development, Computer Vision, Image Analysis
★ 3.2 (70) · Mixed · Course · 1 - 3 Months