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: Embedded Software, Performance Tuning, System Programming, Software Development Tools, Embedded Systems, Memory Management, Microarchitecture, Software Development, Hardware Architecture, Debugging, Secure Coding, Build Tools, Application Security, Computer Architecture, System Configuration, Programming Principles, C (Programming Language), Digital Signal Processing, Application Development, C++ (Programming Language)
★ 4.7 (210) · Intermediate · Specialization · 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

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, Amazon Elastic Compute Cloud, Operating Systems, Data Validation
★ 4 (279) · Intermediate · Course · 1 - 4 Weeks

Peking University
Skills you'll gain: File Systems, Operating Systems, Memory Management, OS Process Management, System Software, Computer Systems, File Management, File I/O, Unix, Performance Tuning, Algorithms
★ 4.6 (363) · Intermediate · Course · 3 - 6 Months

National Taiwan University
Skills you'll gain: Programming Principles, Computer Programming, C (Programming Language), Data Structures, Computational Logic, Program Development, Memory Management
★ 4.8 (370) · Mixed · Course · 1 - 3 Months

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

EDUCBA
Skills you'll gain: C (Programming Language), Embedded Systems, Embedded Software, Debugging, System Programming, Systems Architecture, Hardware Architecture, Microarchitecture, Computer Architecture, Data Structures, Computer Hardware, Peripheral Devices, Memory Management, Data Storage
★ 4.2 (161) · Beginner · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: Memory Management, Performance Tuning, System Programming, Hardware Architecture, Program Development, Computer Architecture, Performance Testing, Computer Hardware, Algorithms
★ 2.9 (68) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: Network Troubleshooting, Display Devices, Cloud Computing Architecture, Networking Hardware, Dynamic Host Configuration Protocol (DHCP), Cloud Computing, Firewall, Virtual Networking, Mobile Security, Network Infrastructure, USB, Computer Networking, Cloud Services, Network Support, Microarchitecture, System Configuration, Computer Systems, Data Storage, Information Technology, Memory Management
★ 4.5 (94) · Intermediate · Specialization · 3 - 6 Months

Universidad Nacional Autónoma de México
Skills you'll gain: Java, Object Oriented Programming (OOP), Java Programming, Object Oriented Design, Android Development, Android Studio, Mobile Development, Memory Management, Computer Programming, Programming Principles, Code Reusability, Integrated Development Environments, Computational Logic, Development Environment
★ 4.7 (1.5K) · Mixed · Course · 1 - 4 Weeks

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

Skills you'll gain: Microarchitecture, Computer Architecture, Hardware Architecture, Computer Hardware, System Programming, Data Storage, Memory Management, Computational Logic, Computer Programming, C (Programming Language), Data Storage Technologies, Program Development, C# (Programming Language)
★ 4.7 (82) · Beginner · Course · 1 - 3 Months