Coursera
Skills you'll gain: API Testing, Test Script Development, Scenario Testing, Software Testing, Integration Testing, Test Case, Test Automation, Acceptance Testing, Test Tools, Regression Testing, Maintainability, Test Execution Engine, User Interface (UI), Security Testing, Test Data, Scalability, Debugging, Authentications, Compliance Reporting, Automation
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Email Automation, People Analytics, Job Analysis, Business Analysis, Grammar, Customer Support, Debugging
Beginner · Course · 1 - 3 Months

Skills you'll gain: Bash (Scripting Language), Shell Script, Linux Commands, Unix Shell, Scripting, Linux, Unix Commands, Command-Line Interface, User Interface (UI), IT Automation, Interactive Design, File I/O, Programming Principles, Debugging, File Management
Mixed · Course · 1 - 4 Weeks

Codio
Skills you'll gain: Model View Controller, Test Driven Development (TDD), Restful API, Vue.JS, Full-Stack Web Development, Frontend Integration, Web Applications, Unit Testing, Server Side, Javascript, HTML and CSS, Cascading Style Sheets (CSS), User Interface (UI)
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Bash (Scripting Language), Shell Script, Unix Shell, Scripting, Linux Commands, Unix Commands, Linux, Command-Line Interface, User Interface (UI), Graphical Tools, Debugging
Advanced · Course · 1 - 3 Months

Skills you'll gain: Vue.JS, JavaScript Frameworks, Front-End Web Development, Web Applications, UI Components, Web Design and Development, Hypertext Markup Language (HTML), Application Programming Interface (API), User Interface (UI), Event-Driven Programming, Data Validation, Data Management
Beginner · Course · 1 - 3 Months

Skills you'll gain: Object Oriented Programming (OOP), Object Oriented Design, C and C++, Computer Programming, Embedded Software, Development Environment, Integrated Development Environments, Embedded Systems, Algorithms, Game Design, Debugging
Intermediate · Course · 1 - 3 Months
Skills you'll gain: Open Web Application Security Project (OWASP), SonarQube, DevSecOps, Jenkins, Software Development Life Cycle, CI/CD, Application Security, Secure Coding, Continuous Integration, DevOps, Security Testing, Continuous Delivery, Code Review, Vulnerability Assessments, Vulnerability Management, Security Awareness, Docker (Software), Dependency Analysis, Compliance Management, Automation
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Continuous Integration, Continuous Deployment
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Load Balancing, Terraform, TCP/IP, Google Cloud Platform, Kubernetes, Infrastructure as Code (IaC), Public Cloud
Intermediate · Project · Less Than 2 Hours

Skills you'll gain: Routing Protocols, Network Monitoring, Network Performance Management, Virtual Private Networks (VPN), Network Routing, Network Troubleshooting, Network Security, Border Gateway Protocol, TCP/IP, Network Protocols, Multiprotocol Label Switching, Network Infrastructure, Wide Area Networks, Virtual Networking, Authentications, Debugging
Intermediate · Course · 3 - 6 Months

Skills you'll gain: Rust (Programming Language), Authentications, Back-End Web Development, Web Servers, Databases, Web Applications, Secure Coding, Restful API, Application Programming Interface (API), Programming Principles, Data Structures, Debugging
Intermediate · Course · 1 - 4 Weeks