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New exercises added to: Ruby, Java, PHP, Python, C Programming, Matplotlib, Python NumPy, Python Pandas, PL/SQL, Swift

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Frontend tutorials
HTML CSS JavaScript HTML5 Schema.org php.js Twitter Bootstrap Responsive Web Design tutorial Zurb Foundation 3 tutorials Pure CSS HTML5 Canvas JavaScript Course Icon Angular
Backend tutorials
PHP Python Java Node.js Ruby C programming Python-NumPy Composer PHPUnit Laravel
Database tutorials
SQL(2003 standard of ANSI) MySQL PostgreSQL SQLite NoSQL MongoDBOracle Redis
Exercises with online editor
HTML CSS JavaScript jQuery jQuery-UICoffeeScript PHP Python NumPy Pandas Ruby Matplotlib C Programming C# Sharp C++ Java R programming Swift SQL Oracle PL/SQL MySQL SQLite PostgreSQL MongoDB Twitter Bootstrap Examples Euler Project
Linux, Data interchange & API tutorials
Linux Home Linux Commands Linux Server Administration XML JSON Ajax Google Plus API Youtube API Google Maps API Flickr API Last.fm API Twitter REST API
Miscellaneous Tutorials
Excel Tutorial Firebug Tutorial Useful Tools Google Docs Forms Template Google Docs Slides Presentation Number Conversion
Quizzes
HTML5 PHP SQL Python MySQL JavaScript I JavaScript II JavaScript III MongoDB