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.

Simplilearn
Skills you'll gain: Object Oriented Programming (OOP), C++ (Programming Language), Object Oriented Design, Memory Management, Computer Programming, Code Reusability, Programming Principles, Algorithms, Data Structures, Data Manipulation
★ 4.4 (59) · Beginner · Course · 1 - 4 Weeks

Dartmouth College
Skills you'll gain: C (Programming Language), Memory Management, C and C++, Embedded Systems, Data Structures, Programming Principles, Computer Engineering, Algorithms, Computer Programming, Linux
★ 4.4 (58) · Beginner · Course · 1 - 3 Months

Skills you'll gain: C and C++, File I/O, C++ (Programming Language), Object Oriented Design, Object Oriented Programming (OOP), Debugging, Data Structures, C (Programming Language), Code Reusability, Development Environment, Program Development, Programming Principles, Computer Programming, Memory Management, Computer Programming Tools, Data Persistence, Integrated Development Environments, Algorithms, Functional Design, Data Management
★ 4.6 (21) · Intermediate · Specialization · 1 - 3 Months

28DIGITAL
Skills you'll gain: File I/O, Data Structures, Theoretical Computer Science, Algorithms, Memory Management, Graph Theory, Data Access, Performance Tuning
★ 4.6 (60) · Advanced · Course · 1 - 3 Months

Birla Institute of Technology & Science, Pilani
Skills you'll gain: C (Programming Language), Programming Principles, Computer Programming, Memory Management, Computational Thinking, Computer Systems, Data Structures, Algorithms, File I/O, Operating Systems, Computer Hardware
★ 4.5 (56) · Beginner · Course · 1 - 3 Months

Dartmouth College
Skills you'll gain: Command-Line Interface, Linux Commands, Linux, Embedded Software, Embedded Systems, Linux Servers, Computer Engineering, File Systems, Unix, C (Programming Language), File Management, Memory Management, Computer Programming, Open Source Technology, OS Process Management, Build Tools
★ 4.7 (35) · Beginner · Course · 1 - 3 Months

Birla Institute of Technology & Science, Pilani
Skills you'll gain: Computer Architecture, Hardware Architecture, Microarchitecture, Computer Systems, Computational Logic, Hardware Design, Computer Hardware, Programming Principles, System Programming, Systems Architecture, Program Development, Data Storage, Memory Management
★ 4.5 (13) · Beginner · 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, Information Systems Security, Network Security, Security Testing, Firewall, Digital Forensics, Anomaly Detection, Code Review, Network Routing, Proxy Servers, Linux, Internet Of Things
★ 4.5 (174) · Beginner · Course · 1 - 4 Weeks

Edureka
Skills you'll gain: Cloud-Native Computing, Memory Management, Grafana, Web Applications, Program Development, Software Architecture, Development Environment, Programming Principles, Computer Programming, Other Programming Languages, Network Security, Communication Systems, Data Sharing
★ 2.9 (46) · Intermediate · Specialization · 3 - 6 Months

Peking University
Skills you'll gain: Memory Management, Data Structures, Algorithms, Computer Science, Program Development, Performance Tuning
★ 4.3 (106) · Mixed · Course · 1 - 3 Months

Princeton University
Skills you'll gain: Data Structures, Algorithms, Java Programming, Java, Graph Theory, Computer Programming, Computational Thinking, Spatial Data Analysis, Theoretical Computer Science, Memory Management, Simulations, Performance Tuning
★ 4.8 (84) · Intermediate · Course · 3 - 6 Months

Skills you'll gain: Open Web Application Security Project (OWASP), Vulnerability Scanning, Proxy Servers, Security Testing, Penetration Testing, Vulnerability Assessments, Brute-force attacks, Test Tools, Web Scraping
★ 4.3 (290) · Intermediate · Guided Project · Less Than 2 Hours