Language courses can help you learn grammar, vocabulary development, pronunciation techniques, and conversational skills. You can build skills in writing clearly, understanding cultural nuances, and using language for specific purposes like business or travel. Many courses introduce tools such as language learning apps, online dictionaries, and pronunciation software, which enhance your ability to practice and apply what you've learned in everyday situations.

Universiteit Leiden
Skills you'll gain: Statistical Inference, Statistical Hypothesis Testing, Regression Analysis, R Programming, Data Analysis, Statistical Analysis, Descriptive Analytics, R (Software), Descriptive Statistics, Statistical Methods, Sampling (Statistics), Analysis, Probability & Statistics, Data Ethics, Data Collection, Analytical Skills, Medical Privacy, Exploratory Data Analysis, Statistical Reporting, Logistic Regression
★ 4.6 (46) · Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Oracle SQL Developer, Oracle Databases, PL/SQL, Database Administration, SQL, Database Management Systems, Database Architecture and Administration, Stored Procedure, Database Management, Network Architecture, Software Development Tools, Change Control
★ 4.6 (124) · Beginner · Course · 1 - 4 Weeks

Duke University
Skills you'll gain: Bash (Scripting Language), Linux Commands, Shell Script, Linux, Linux Administration, Unix Shell, File Management, grep, File Systems, Scripting, Command-Line Interface, File I/O, Scripting Languages, Remote Access Systems, Data Manipulation, Data Processing, Data Management, Development Environment
★ 4.6 (136) · Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Model Context Protocol, Retrieval-Augmented Generation, Generative AI, AI Workflows, LLM Application, Generative AI Agents, AI Orchestration, Multimodal Prompts, Agentic Workflows, Embeddings, JSON, Tool Calling, Large Language Modeling, Agentic systems, Vector Databases, Unstructured Data, System Testing
★ 4.4 (32) · Advanced · Course · 1 - 3 Months

Johns Hopkins University
Skills you'll gain: Javascript, Ajax, JSON, Web Applications, Web Development, Object Oriented Programming (OOP), Event-Driven Programming, Programming Principles, Network Protocols
★ 4.5 (57) · Mixed · Course · 1 - 4 Weeks

Google Cloud
Skills you'll gain: Looker (Software), SQL, Data Pipelines, Data Transformation, Extract, Transform, Load, Data Warehousing, Data Cleansing, Dashboard Creation, Data Analysis, Data Integration, Data Visualization Software, Google Sheets, Query Languages, Google Cloud Platform, Data Import/Export, Data Integrity
★ 4.3 (84) · Intermediate · Course · 1 - 3 Months

The Linux Foundation
Skills you'll gain: Bash (Scripting Language), File Systems, Package and Software Management, Linux, Command-Line Interface, Unix Commands, Linux Commands, Shell Script, grep, Linux Administration, Unix Shell, Scripting, Software Development Tools, Computer Programming Tools, File Management, Build Tools, Unix, Scripting Languages, Program Development, System Programming
★ 4.6 (735) · Beginner · Course · 1 - 4 Weeks

LearnKartS
Skills you'll gain: Apache Kafka, Real Time Data, Data Pipelines, Analytics, Distributed Computing, Data Processing, Live Streaming, Systems Architecture, Event-Driven Programming, Development Environment
★ 3.9 (43) · Beginner · Course · 1 - 3 Months

Skills you'll gain: Selenium (Software), Test Automation, Object Oriented Programming (OOP), File I/O, Test Script Development, Software Testing, Programming Principles, Browser Compatibility, Web Development Tools, Software Installation, Automation, Python Programming, Development Environment, Integrated Development Environments, Package and Software Management
★ 4.6 (16) · Beginner · Course · 1 - 3 Months

Skills you'll gain: SQL, Data Manipulation, Query Languages, Data Access, PostgreSQL, Data Management
★ 4.7 (80) · Intermediate · Guided Project · Less Than 2 Hours

Skills you'll gain: Regression Analysis, Predictive Modeling, Exploratory Data Analysis, Model Evaluation, Model Training, Statistical Machine Learning, Scikit Learn (Machine Learning Library), Supervised Learning, Machine Learning Methods, Statistical Methods, Applied Machine Learning, Machine Learning, Data Preprocessing, Decision Tree Learning, Deep Learning, Data Analysis, Test Data, Artificial Neural Networks, Data Import/Export, Python Programming
★ 4.8 (69) · Beginner · Guided Project · Less Than 2 Hours
Alberta Machine Intelligence Institute
Skills you'll gain: Prompt Engineering, Large Language Modeling, Responsible AI, Generative AI, Generative Model Architectures, LLM Application, AI powered creativity, Data Ethics, AI literacy, AI Workflows, Business Ethics, ChatGPT, Ethical Standards And Conduct, Artificial Intelligence and Machine Learning (AI/ML), Deep Learning, Computer Vision, Natural Language Processing, Reinforcement Learning, Data Processing, Data Science
★ 5 (7) · Beginner · Specialization · 1 - 3 Months