High-level languages

• AutoHotkey / AHK
• Erlang
• Go / Golang
• Python
• Ruby / Ruby on Rails (Programming)
• Shell / command languages
• SQL

Mid-level languages

• C++
• Java (Programming)
  • Processing (Programming)

Low-level languages

• C
• Assembly Language
• Machine Language (Programming)

Web languages

• CSS
• HTML
• JavaScript
• PHP

JavaScript frameworks

• Angular.js

Functional languages

• Haskell
• Lisp
• Scala

Mobile development frameworks

• Development frameworks (Mobile)

Concatenative Languages

• “␣;”: A Simply Arited Concatenative Language
  • The article looks well-written.

Misc languages

• EasyLanguage
  • The language was intended to allow creation of custom trading strategies by traders without specialized computer training. Commands consist mostly of regular English words, which makes EasyLanguage easier to learn than more complex programming languages.
  • Example: "if the close is greater than the high of 1 day ago, then buy 100 shares at market" This is written in EasyLanguage as the following: "if the Close > the High of 1 day ago then Buy 100 shares next bar at market;"

Tools / Resources

• Try It Online
  • This lets you run code in a ton of different languages in an online interpreter, with a debugger!
• EBookFoundation - Free Programming Books