Free courses can help you learn coding languages like Python and JavaScript, data analysis techniques, and web development fundamentals. You can build skills in problem-solving, algorithm design, and creating interactive websites. Many courses introduce tools such as Git for version control, SQL for database management, and various frameworks that streamline web development, allowing you to apply your skills in practical projects.

Skills you'll gain: Hardware Troubleshooting, Computer Hardware, Hardware Architecture, Software Installation, Microarchitecture, Computer Architecture, Desktop Support, IT Infrastructure, Data Storage Technologies, System Configuration, Data Storage, Information Technology, Memory Management
★ 4.5 (74) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Kubernetes, Release Management, Cloud Infrastructure, Software Installation, Application Lifecycle Management, Performance Tuning, Cloud Computing, General Networking, Systems Architecture, Software Architecture, Network Model, Memory Management
★ 4.2 (68) · Intermediate · Specialization · 3 - 6 Months

University of Colorado System
Skills you'll gain: Penetration Testing, Exploit development, Metasploit, Application Security, Security Testing, Vulnerability Scanning, Cyber Security Assessment, Brute-force attacks, Secure Coding, Exploitation techniques, Software Design Patterns, Vulnerability Assessments, Memory Management, Amazon Web Services, SQL, Amazon Elastic Compute Cloud, Operating Systems, Data Validation
★ 4 (279) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: File I/O, Memory Management, Debugging, C++ (Programming Language), C and C++, Software Documentation, Code Reusability, Development Testing, Vibe coding, Programming Principles, API Design, Program Development, Pseudocode, Software Architecture, Software Design, Functional Design, Performance Tuning, Application Design, Technical Documentation, Generative AI
★ 4.4 (46) · Beginner · Professional Certificate · 3 - 6 Months

Google Cloud
Skills you'll gain: API Gateway, Application Programming Interface (API), Cloud API, API Design, Application Deployment, Restful API, Continuous Deployment, AI Integrations, Cloud Deployment, LLM Application, Web Services, AI Security, CI/CD, AI Workflows, Token Optimization, Prompt Patterns, Proxy Servers, Large Language Modeling, Application Lifecycle Management, Simple Object Access Protocol (SOAP)
★ 4.6 (1.1K) · Beginner · Course · 1 - 3 Months

Peking University
Skills you'll gain: C and C++, Object Oriented Design, Object Oriented Programming (OOP), C (Programming Language), Programming Principles, Data Structures, Computer Programming, Algorithms, Maintainability, Memory Management
★ 4.9 (827) · Mixed · Course · 1 - 3 Months

New York University
Skills you'll gain: Network Security, Firewall, IT Security Architecture, Distributed Denial-Of-Service (DDoS) Attacks, Network Architecture, Intrusion Detection and Prevention, TCP/IP, Cybersecurity, Threat Detection, Cyber Threat Intelligence, Cyber Attacks, Security Controls, Enterprise Security, Network Protocols, Proxy Servers
★ 4.7 (664) · Intermediate · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Artificial Neural Networks, Image Analysis, Event-Driven Programming, Scalability, Applied Machine Learning, Deep Learning, C and C++, Performance Tuning, Memory Management, C++ (Programming Language), Dataflow, Digital Signal Processing, Linear Algebra, Distributed Computing, Hardware Architecture, Programming Principles, Computer Architecture, System Programming, Program Development, Machine Learning
★ 2.9 (211) · Intermediate · Specialization · 3 - 6 Months

University of Toronto
Skills you'll gain: Apple iOS, iOS Development, Swift Programming, Model View Controller, Apple Xcode, Mobile Development, User Interface (UI), Application Design, User Interface (UI) Design, Application Development, Objective-C (Programming Language), UI Components, Animations, Human Computer Interaction, Interactive Design, Object Oriented Programming (OOP), Memory Management, Application Frameworks, Interaction Design, Persistence
★ 3.9 (1.6K) · Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: AI Orchestration, AI Workflows, Agentic Workflows, Agentic systems, Generative AI Agents, LLM Application, AI Integrations, Tool Calling, Large Language Modeling, Software Design Patterns, Memory Management
★ 4.7 (106) · Intermediate · Course · 1 - 4 Weeks

École Polytechnique Fédérale de Lausanne
Skills you'll gain: Object Oriented Programming (OOP), Java Programming, Java, Object Oriented Design, Computer Programming, Memory Management
★ 4.7 (319) · Intermediate · Course · 1 - 3 Months

L&T EduTech
Skills you'll gain: Embedded Software, Peripheral Devices, Integrated Development Environments, Embedded Systems, Internet Of Things, Microarchitecture, Automation, Real Time Data, Hardware Architecture, Computer Architecture, Prototyping, Memory Management
★ 4.6 (298) · Beginner · Course · 1 - 3 Months