Some Online Compilers

• Trinkets: Python Interpreter: https://trinket.io/python3
  • Trinkets: Python Shell: https://trinket.io/console
  • Example with matplotlib: https://trinket.io/features/python3
  • Hour of Python: https://hourofpython.com/
• OnlineGDB: https://www.onlinegdb.com/
• OneCompiler: https://onecompiler.com/python
• Replit: https://repl.it/languages/python3
• TutorialsPoint: http://www.tutorialspoint.com/codingground.htm

• FreeSQL: https://freesql.com/

• Quick online compiler for Java, PHP, Python, C#, Objective-C++, etc. https://onecompiler.com/ Great free, online compiler for many different languages
• Excellent online compiler for Java, PHP, Python, C#, Objective-C++, etc. https://www.onlinegdb.com/ Connects to GitHub, as well!
• Quick online compiler for Java, PHP, Python, C#, Objective-C++, etc. https://repl.it/ Great online compiler for many different languages (REPL == Read-Evaluate-Print Loop) but behind a registrationwall/paywall now
• Comprehensive online compiler for Java, PHP, Python, C#, Objective-C++, etc. https://www.jdoodle.com/start-coding Also significant IDE functionality
• Powerful online compiler for Java, PHP, Python, C#, Objective-C++, etc. https://paiza.io/en This one lets you upload files and use them there (or at least copy and paste them there)
• One more great online compiler for Java, PHP, Python, C#, etc. http://www.tutorialspoint.com/codingground.htm One more free, online compiler for many different languages (used to be http://compileonline.com/ )
• Yet one more great online compiler for Java, PHP, Python, C#, etc. https://codepad.remoteinterview.io/pads Yet one more free, online compiler for many different languages
• Another excellent online compiler for Java, PHP, Python, C#, etc. http://ideone.com/ Another great free, online compiler for many different languages
• Nice online compiler for Java, PHP, Python, C#, Objective-C++, etc. https://www.nitrous.io/ Great free, online compiler for many different languages
• Very nice Java compiler http://www.browxy.com/ Browxy is a free Java compiler, launcher, and publisher; just choose the "Hello World" example program and click "Start".
• Online coding practice and Java compiler http://codingbat.com/ Live coding problems to build coding skill in Java and Python
• Java is pass-by-value only http://www.javaworld.com/article/2077424/learn-java/does-java-pass-by-reference-or-pass-by-value.html Clarify the confusion of pass-by-reference vs pass-by-value in Java