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: Computer Architecture, Mainframe Computing, Mainframe Technologies, Systems Architecture, Hardware Architecture, Data Storage, Computer Science, Computer Systems, Programming Principles, System Programming, Computational Logic, Computer Programming, Memory Management
★ 3.9 (10) · 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, Network Security, Security Testing, Threat Detection, Firewall, Digital Forensics, Anomaly Detection, Code Review, Routing Protocols, Network Routing, Proxy Servers, Linux, Internet Of Things
★ 4.5 (174) · Beginner · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Embedded Software, Real-Time Operating Systems, Embedded Systems, Software Architecture, Code Reusability, Pseudocode, Microarchitecture, Memory Management, Systems Architecture, Computer Hardware, System Programming, Computer Architecture, Software Design, Cross Platform Development, Software Systems, Hardware Architecture, Systems Design, Software Design Patterns, Internet Of Things, Hardware Troubleshooting
Intermediate · Specialization · 1 - 3 Months

Skills you'll gain: Linux, Ubuntu, Linux Administration, Linux Servers, General Networking, Memory Management, Linux Commands, OS Process Management, Firewall, File Systems, Bash (Scripting Language), Network Security, Command-Line Interface, File Management, Unix Shell, Operating Systems, Systems Administration, Virtualization, Virtual Environment, Virtualization and Virtual Machines
Beginner · Course · 1 - 3 Months

Infosec
Skills you'll gain: Secure Coding, C and C++, Application Security, System Programming, C++ (Programming Language), C (Programming Language), Security Engineering, Interoperability, Unix, Embedded Software, Information Systems Security, OS Process Management, Embedded Systems, Operating Systems, Data Security, Memory Management, Authorization (Computing), Linux
★ 3.9 (11) · Mixed · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Campaign Planning, Communication Planning, Campaign Management, Strategic Communication, Advertising, Marketing Communications, Resource Allocation, Media Strategy, Brand Management, Integrated Marketing Communications, Brand Strategy, Earned Media, Communication Strategies, Owned Media, Public Relations, Shared Media, Paid media, Key Performance Indicators (KPIs), Research and Design, Market Research
★ 4.4 (9) · Beginner · Course · 1 - 4 Weeks

Johns Hopkins University
Skills you'll gain: MITRE ATT&CK Framework, Metasploit, Penetration Testing, Exploit development, Exploitation techniques, Threat Modeling, Cyber Security Assessment, Cybersecurity, Operating System Administration, Operating Systems, Hardening, Computer Security, Malware Protection, Vulnerability Assessments, Security Controls, Authorization (Computing), Identity and Access Management, Memory Management, Data Persistence, Computer Architecture
★ 4.1 (9) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: AI Orchestration, Prompt Patterns, AI Workflows, Agentic Workflows, AI Integrations, OpenAI API, Token Optimization, Test Script Development, Context Management, Code Reusability, Secure Coding, Memory Management, Authentications
Intermediate · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Generative AI Agents, Agentic Workflows, Agentic systems, Generative AI, Prompt Engineering, Prompt Patterns, LLM Application, Systems Architecture, Tool Calling, Natural Language Processing, Context Management, Memory Management, Verification And Validation
Intermediate · Course · 1 - 4 Weeks

Birla Institute of Technology & Science, Pilani
Skills you'll gain: Computer Architecture, Hardware Architecture, Computer Systems, System Programming, Memory Management, File Systems, Data Access, Dependency Analysis, Cloud Platforms
Intermediate · Course · 1 - 3 Months

Edureka
Skills you'll gain: Memory Management, Code Reusability, Programming Principles, Integrated Development Environments, Web Development, System Programming, Maintainability
★ 3.6 (18) · Beginner · Course · 1 - 4 Weeks

Pearson
Skills you'll gain: Linux Administration, Containerization, Linux, Memory Management, Linux Commands, OS Process Management, File Systems, System Programming, Operating Systems, Data Storage, Cloud Storage, Data Storage Technologies, General Networking, Network Administration, Performance Tuning, System Configuration, C (Programming Language), Git (Version Control System)
Intermediate · Course · 1 - 4 Weeks