HTML, CSS, and JavaScript courses can help you learn web page structure, styling, and interactivity, along with responsive design and accessibility practices. You can build skills in creating layouts, implementing animations, and optimizing user experiences across different devices. Many courses introduce tools like code editors, version control systems, and browser developer tools, that support testing and refining your projects. By mastering these skills and tools, you’ll be well-equipped to develop engaging websites and applications.

University of Colorado Boulder
Skills you'll gain: Scikit Learn (Machine Learning Library), Data Preprocessing
Intermediate · Course · 1 - 3 Months

Skills you'll gain: Email Automation, Marketing Automation, Email Marketing, Regulatory Compliance, Customer Relationship Management (CRM) Software, Marketing Analytics, Customer Engagement, Target Audience, Customer Data Management, Compliance Management, Compliance Auditing, Copywriting, Performance Analysis, Return On Investment, General Data Protection Regulation (GDPR), Brand Management, Campaign Management, Editing, Customer Analysis, Data Cleansing
Intermediate · Specialization · 3 - 6 Months

Skills you'll gain: Swift Programming, Mobile Development, Apple iOS, Apple Xcode, Application Development, UI Components, Data Persistence, User Interface (UI), Debugging, User Interface (UI) Design, Data Structures, Data Modeling, Animations
Beginner · Course · 3 - 6 Months

Coursera
Skills you'll gain: Email Marketing, Email Automation, Marketing Automation, Content Performance Analysis, Campaign Management, A/B Testing, Data-Driven Decision-Making, Case Studies, Consumer Behaviour, Performance Analysis, Email Security, Marketing Analytics, Performance Metric, Key Performance Indicators (KPIs), E-Commerce, Automation, Product Improvement, Disaster Recovery, Recruitment, Security Awareness
Intermediate · Course · 1 - 4 Weeks

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

Skills you'll gain: AI Security, Investment Management, Technology Strategies, Business Ethics, Customer experience improvement, Operational Efficiency
Beginner · Course · 1 - 4 Weeks

Duke University
Skills you'll gain: Behavioral Economics, Decision Making, Financial Planning, Finance, Consumer Behaviour, Financial Analysis, Economics, Psychology, Probability & Statistics, Risk Analysis
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Behavioral Economics, Investments, Financial Analysis, Investment Management, Financial Market, Finance, Portfolio Management, Decision Making, Portfolio Risk, Market Dynamics, Asset Management, Economics, Risk Analysis, Probability & Statistics
Beginner · Course · 1 - 3 Months

Logical Operations
Skills you'll gain: Excel Macros, Microsoft Excel, Visual Basic (Programming Language), Automation, Computer Programming Tools, Microsoft 365, Data Wrangling, Microsoft Office, Spreadsheet Software, Development Environment, Computer Programming, Data Science
Mixed · Course · 1 - 4 Weeks

Skills you'll gain: Data Validation, .NET Framework, System Requirements, Database Design, C# (Programming Language), ASP.NET, User Interface (UI) Design, Databases, Application Development, Healthcare Project Management, Application Design, Object Oriented Programming (OOP), Business Logic, Microsoft Visual Studio, Debugging
Intermediate · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Hardening, Incident Response, Single Sign-On (SSO), Threat Management, Security Management, Security Controls, Continuous Monitoring, User Provisioning, Threat Detection, Security Information and Event Management (SIEM), Identity and Access Management, Enterprise Application Management, IT Automation
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Database Design, Apache Spark, SQL, Data Transformation, Performance Tuning, Disaster Recovery, Database Management, PySpark, Query Languages, Infrastructure as Code (IaC), Data Architecture, Cloud Computing Architecture, Data Warehousing, Distributed Computing, Data Pipelines, Performance Analysis, Scalability, Root Cause Analysis, Cost Management, Resource Management
Intermediate · Specialization · 3 - 6 Months