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.

University of California, Irvine
Skills you'll gain: Objective-C (Programming Language), iOS Development, Apple iOS, Memory Management, Prototyping, Mobile Development, C and C++, Application Development, C (Programming Language), Object Oriented Programming (OOP), Computer Programming, Programming Principles, Data Structures
★ 4.6 (558) · Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Field-Programmable Gate Array (FPGA), Computational Logic, Computer Architecture, Hardware Design, Hardware Architecture, Memory Management, Electronics, Electronic Systems, Electronic Components, Diagram Design, Data Storage, Data Storage Technologies, Algorithms
★ 4.5 (131) · Intermediate · Course · 1 - 4 Weeks

Duke University
Skills you'll gain: Rust (Programming Language), Unit Testing, Test Case, Memory Management, Software Testing, Data Structures, GitHub, Programming Principles, Package and Software Management, Development Environment, System Programming, Software Documentation
★ 4 (240) · Beginner · Course · 1 - 4 Weeks

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

Vanderbilt University
Skills you'll gain: Generative AI Agents, Agentic systems, Agentic Workflows, Generative AI, Email Automation, Prompt Engineering, AI Workflows, ChatGPT, AI Personalization, Expense Management, Expense Reports, AI Orchestration, AI literacy, Workflow Management, Tool Calling, Google Sheets, AI Integrations, Memory Management
★ 4.6 (136) · Beginner · Course · 1 - 4 Weeks

Skills you'll gain: API Design, API Gateway, Cloud API, Application Programming Interface (API), Restful API, Google Cloud Platform, Continuous Deployment, CI/CD, Application Deployment, Middleware, Software Versioning, Web Services, Cloud Deployment, Continuous Integration, Proxy Servers
★ 4.6 (1.1K) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Embedded Software, Performance Tuning, System Programming, Software Development Tools, Embedded Systems, Memory Management, Microarchitecture, Software Development, Hardware Architecture, Debugging, System Software, Secure Coding, Build Tools, Application Security, Computer Architecture, System Configuration, Programming Principles, C (Programming Language), Digital Signal Processing, Real-Time Operating Systems
★ 4.6 (206) · Intermediate · Specialization · 3 - 6 Months

Infosec
Skills you'll gain: Incident Response, Computer Security Incident Management, Incident Management, Threat Management, Cybersecurity, Endpoint Detection and Response, Cyber Attacks, Cyber Threat Intelligence, Digital Forensics, Intrusion Detection and Prevention, Threat Detection, Network Security, Network Monitoring, Data Security, Business Continuity, Network Analysis, Exploitation techniques, Malware Protection, Memory Management, Analysis
★ 4.7 (275) · Beginner · Specialization · 3 - 6 Months

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

University of Colorado System
Skills you'll gain: Penetration Testing, Exploit development, Metasploit, Application Security, Security Testing, Cyber Security Assessment, Vulnerability Scanning, 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

Peking University
Skills you'll gain: File Systems, OS Process Management, Operating Systems, Memory Management, System Software, System Programming, File I/O, Data Storage, Peripheral Devices, File Management, Computer Systems, Unix, Linux, Microsoft Windows, Algorithms
★ 4.6 (363) · Intermediate · Course · 3 - 6 Months

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