Core Java courses can help you learn object-oriented programming, exception handling, multithreading, and Java Collections. You can build skills in writing efficient algorithms, debugging code, and developing user interfaces. Many courses introduce tools like Eclipse and IntelliJ IDEA, which are commonly used for coding and testing Java applications, along with frameworks such as Spring and Hibernate that facilitate web development and database management.

Skills you'll gain: Creativity, Computer Graphic Techniques, Graphics Software, Peer Review, Digital Design, Creative Design, Color Theory
Mixed · Course · 1 - 4 Weeks

University of Geneva
Skills you'll gain: Data-oriented programming, Operating Systems, Simulation and Simulation Software
Intermediate · Course · 1 - 3 Months
Skills you'll gain: Descriptive Statistics, Statistical Hypothesis Testing, Correlation Analysis, Tidyverse (R Package), Data Analysis, Regression Analysis, Probability & Statistics, Statistical Methods, Data Import/Export, Statistical Analysis, R Programming, Data Wrangling, Data Manipulation
Beginner · Course · 1 - 3 Months

Board Infinity
Skills you'll gain: Responsive Web Design, User Interface (UI) Design, HTML and CSS, Front-End Web Development, Web Development Tools, Web Design and Development, Bootstrap (Front-End Framework), React.js, Javascript, UI Components, JavaScript Frameworks, Web Components, Software Development Tools, Semantic Web
Beginner · Course · 1 - 4 Weeks

University of Colorado Boulder
Skills you'll gain: Data-Driven Decision-Making, Descriptive Statistics, Data Analysis, Probability Distribution, Statistical Software, Statistics, R (Software), Data Visualization, Statistical Analysis, Probability, R Programming, Probability & Statistics, Data Manipulation, Histogram, Taxonomy, Data Import/Export
Beginner · Course · 1 - 3 Months

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

LearnQuest
Skills you'll gain: Blockchain, Security Controls, Cybersecurity, Security Engineering, Network Security, Cryptography, Vulnerability Assessments, Encryption, Transaction Processing, Key Management, Risk Management, Public Key Cryptography Standards (PKCS), Data Integrity, Scalability
Intermediate · Course · 1 - 3 Months

LearnKartS
Skills you'll gain: Microservices, Network Monitoring
Intermediate · Course · 1 - 4 Weeks

Scrimba
Skills you'll gain: JSON, Restful API, Web Applications, Application Programming Interface (API), Responsive Web Design, Cascading Style Sheets (CSS), Event-Driven Programming, HTML and CSS, Javascript, Back-End Web Development, Frontend Integration, Web Development, Web Services, Real Time Data, Web Development Tools, Game Design, Hypertext Markup Language (HTML), Servers, Software Development
Intermediate · Specialization · 1 - 4 Weeks

Skills you'll gain: Cash Flows, Income Statement, Financial Analysis, Financial Accounting, Revenue Recognition, Generally Accepted Accounting Principles (GAAP), Revenue Management, Accrual Accounting, Finance
Mixed · Course · 1 - 3 Months

Skills you'll gain: Dashboard, Data Preprocessing, Data Visualization Software, Real Time Data, Node.JS, Data Analysis, Application Programming Interface (API), Web Development Tools, JSON, Javascript
Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Amazon CloudWatch, Network Troubleshooting, Continuous Monitoring, Identity and Access Management, Dynamic Host Configuration Protocol (DHCP), AWS Identity and Access Management (IAM), Encryption, Network Security, System Monitoring, Virtual Networking, Network Routing, Network Architecture, Hybrid Cloud Computing, Network Administration, Amazon Web Services, Network Planning And Design, Security Controls, Cloud Security, Network Infrastructure, AWS CloudFormation
Intermediate · Specialization · 1 - 3 Months