
EDUCBA
Skills you'll gain: Object Oriented Programming (OOP), Java Programming, File I/O, Application Development, Computer Programming, User Interface (UI), Programming Principles, Databases, System Design and Implementation, Integrated Development Environments, SQL, Data Validation
Beginner · Course · 1 - 3 Months

Skills you'll gain: Firewall, Ubuntu, Network Monitoring, TCP/IP, Data Storage, Network Protocols, Network Troubleshooting, Unix, General Networking, Linux, Command-Line Interface, Data Storage Technologies, System Configuration, Network Security, File Management, Shell Script, Computer Hardware, Disaster Recovery
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: TypeScript, React.js, Javascript, Debugging, Integrated Development Environments, Context Management
Intermediate · Guided Project · Less Than 2 Hours

HubSpot Academy
Skills you'll gain: Data Visualization, HubSpot CRM, Dashboard, Business Reporting, Customer Relationship Management (CRM) Software, Performance Reporting, Forecasting, Sales Pipelines, Sales Enablement, Business Metrics, Performance Metric, Sales, Data-Driven Decision-Making, Key Performance Indicators (KPIs), Customer Service, Customer Data Management, Customer Success Management, Goal Setting
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Metasploit, Exploitation techniques, Penetration Testing, Database Management, Cryptography, Data Import/Export, MySQL, Vulnerability Scanning, Encryption, Brute-force attacks, Vulnerability Assessments, Cybersecurity, Data Encryption Standard, SQL
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Authentications, OAuth, API Testing, Restful API, Application Programming Interface (API), JSON, Test Automation, Data Validation, Extensible Markup Language (XML), Mockups, Test Tools, Simple Object Access Protocol (SOAP), Virtualization, Debugging
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Database Design, SQL, Relational Databases, Databases, Database Systems, Database Management, Data Modeling, Query Languages
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Embedded Software, Embedded Systems, Computer Hardware, Hardware Architecture, Internet Of Things, Peripheral Devices, C (Programming Language), Software Architecture, Simulations, Debugging, Systems Integration
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Oracle Databases, Data Import/Export, Patch Management, Data Migration, Database Administration, Database Architecture and Administration, Database Management, Data Storage Technologies, Disaster Recovery, System Configuration, Automation, Incident Management, Software Installation
Advanced · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Data Warehousing, Apache Hadoop, Distributed Computing, Scalability, Transaction Processing, Database Design, Database Systems, Data Architecture, Relational Databases, Database Management, Database Architecture and Administration, Databases, Cloud Computing, Query Languages, Big Data, Data Processing, Machine Learning, SQL, Data Access, Performance Tuning
Intermediate · Specialization · 1 - 3 Months

Scrimba
Skills you'll gain: React.js, UI Components, JavaScript Frameworks, Web Development Tools, Maintainability, Javascript, Programming Principles
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: C++ (Programming Language), System Programming, Algorithms, Performance Tuning
Advanced · Course · 1 - 3 Months