Opal is a Ruby to JavaScript source-to-source compiler
A free COBOL compiler
Vampirio Code, a great Code Editor and Compiler
Compiler for Elm, a functional language for reliable webapps
Build Windows desktop applications using PHP, Javascript, CSS & HTML
Haskell to JavaScript compiler, based on GHC
A Haskell to WebAssembly compiler
A proper subset of Haskell that compiles to JavaScript
Scripts and configurations to compile Electron applications
Best IDE for Beginners
Parser generator, targetting C, C++, Python, JavaScript, JSON and XML
Python in the Browser
A JavaScript checker and optimizer
"Perlito" Perl programming language compiler
Converts Elixir to JavaScript
A self-hosting Scheme to WebAssembly compiler
A GHC-based Haskell to JavaScript compiler
A PhoneGap alternative for Desktop applications.
Package for the JS version of closure-compiler for use via NPM
Traceur is a JavaScript.next-to-JavaScript-of-today compiler
Simple programming language for Windows.
A LALR(1) Parser Generator for JavaScript written in JavaScript