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: Apache Maven, Java, Object Oriented Design, Build Tools, Memory Management, Hibernate (Java), Unit Testing, File I/O, Data Persistence, Docker (Software), Software Testing, Software Design Patterns, Integrated Development Environments, Object-Relational Mapping, Functional Design
Beginner · Specialization · 3 - 6 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, Authentications, Memory Management
Intermediate · Course · 1 - 4 Weeks

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

Skills you'll gain: Graph Theory, Data Structures, Algorithms, Computer Programming, Computational Thinking, Theoretical Computer Science, Memory Management, Software Visualization, Performance Tuning
★ 4.6 (7) · Intermediate · Course · 1 - 3 Months

Emory University
Skills you'll gain: Marketing, Marketing Strategy and Techniques, Marketing Effectiveness, Marketing Planning, Marketing Management, Earned Media, Marketing Communications, Promotions and Campaigns, Branding, Market Dynamics, Target Market, Product Promotion, Customer Insights, Owned Media, Conversion Funnel Analysis, Order Delivery
★ 5 (16) · Beginner · Course · 1 - 3 Months

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

Skills you'll gain: LLM Application, Data Processing, Data Transformation, Generative AI Agents, Generative AI, Workflow Management, Artificial Intelligence, Context Management, Memory Management, Automation, JSON
Intermediate · Course · 1 - 4 Weeks

International Institute of Information Technology, Hyderabad
Skills you'll gain: System Programming, Memory Management, Performance Tuning, Programming Principles, Computational Logic, Numerical Analysis, Algorithms, Debugging
★ 4.7 (7) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Hardening, Linux Administration, System Monitoring, Linux Commands, Performance Tuning, Linux, Systems Administration, File Management, Network Troubleshooting, Command-Line Interface, Operating System Administration, Memory Management, Security Management, Debugging, Service Management, OS Process Management, Data Maintenance
★ 4.5 (6) · Advanced · Course · 1 - 4 Weeks

Skills you'll gain: Rust (Programming Language), Data Structures, Code Reusability, Memory Management, Package and Software Management, Algorithms, Software Testing
★ 3.8 (9) · Intermediate · Course · 1 - 3 Months

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

Kennesaw State University
Skills you'll gain: Email Security, Wireless Networks, Mobile Security, Incident Response, Cybersecurity, Cyber Security Assessment, Personally Identifiable Information, Cyber Attacks, Firewall, General Networking, Threat Detection, Cyber Security Policies, Computer Security Awareness Training, Proxy Servers, Computer Security Incident Management, Network Security, Security Awareness, Threat Management, Cyber Risk, Social Media
★ 4.9 (66) · Beginner · Specialization · 3 - 6 Months