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: Transaction Processing, Data Persistence, Performance Tuning, System Programming, Memory Management, Operating Systems, C++ (Programming Language), C (Programming Language), System Configuration, Hardware Architecture, Data Storage, Computer Hardware, Data Storage Technologies, Computing Platforms, Program Development, Application Development
★ 5 (71) · Beginner · Course · 1 - 4 Weeks

Simplilearn
Skills you'll gain: LangChain, LLM Application, Retrieval-Augmented Generation, Embeddings, Large Language Modeling, Tool Calling, AI Workflows, Context Management, Generative AI Agents, Vector Databases, Data Store, Agentic systems, Memory Management
★ 4 (9) · Beginner · Course · 1 - 4 Weeks

Board Infinity
Skills you'll gain: Retrieval-Augmented Generation, AI Workflows, Agentic Workflows, Vector Databases, LangGraph, LangChain, AI Orchestration, LLM Application, Generative AI Agents, Embeddings, Application Performance Management, Large Language Modeling, Agentic systems, Data Pipelines, Semantic Web, Software Visualization, Performance Tuning, Context Management, Debugging, Memory Management
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Blockchain, Memory Management, Programming Principles, Integrated Development Environments, Computational Logic, Software Development Tools, Secure Coding, Other Programming Languages, Program Development, Data Storage, Data Management, Development Testing
★ 4.9 (8) · Intermediate · Course · 1 - 3 Months

Skills you'll gain: File I/O, Object Oriented Programming (OOP), C and C++, C++ (Programming Language), Data Structures, Object Oriented Design, Code Reusability, Memory Management, Data Persistence, Algorithms
★ 4.8 (10) · Advanced · Course · 1 - 4 Weeks

Google Cloud
Skills you'll gain: API Gateway, Cloud API, Application Programming Interface (API), Capacity Management, Kubernetes, Istio, Google Cloud Platform, Scalability, Application Security, Hybrid Cloud Computing, Security Controls, Apache Cassandra, Proxy Servers, Data Security, Application Deployment, Role-Based Access Control (RBAC), Public Key Infrastructure, YAML, Debugging
★ 4.5 (17) · 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

Skills you'll gain: Hardening, Performance Tuning, Systems Analysis, Operating System Administration, Virtual Environment, Virtualization and Virtual Machines, Memory Management, End User Training and Support, Help Desk Support, File I/O, Security Management, Debugging, Service Management, OS Process Management, Data Maintenance, Scripting, Record Keeping, Cloud Deployment
★ 4.3 (12) · Beginner · Specialization · 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

University of California, Santa Cruz
Skills you'll gain: C and C++, C++ (Programming Language), Object Oriented Programming (OOP), Memory Management, C (Programming Language), Algorithms, File I/O, Graph Theory, Data Structures, Secure Coding, Scaled Agile Framework
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

Edureka
Skills you'll gain: Memory Management, Communication Systems, Data Sharing, Web Development
★ 3 (11) · Beginner · Course · 1 - 3 Months