One of the most popular alternatives to JavaScript is Python, which is free and open source. Other popular alternatives are Java, PHP, TypeScript and Lua. You're spoiled for choice with Programming Languages like JavaScript: we list more than 50 alternatives for Linux, Mac, Windows, the web and self-hosting.
The Bosque programming language is an experiment in regularized design for a machine assisted rapid and reliable software development lifecycle.
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pyjs is a Rich Internet Application (RIA) Development Platform for both Web and Desktop. With pyjs you can write your JavaScript-powered web applications entirely in Python.
IronPython is an implementation of the Python programming language running under .NET and Silverlight. It supports an interactive console with fully dynamic compilation. It's well integrated with the rest of the .NET Framework and makes all .
Kaffeine is a set of extensions to the Javascript syntax that attempt to make it nicer to use. It compiles directly into javascript that is very similar, readable and line for line equivalent to the input (you can beautify if you like).
Amber is a language (derived from Smalltalk) and environment built for the web. With Amber, client-side web development finally gets the power and productivity that exists in other Smalltalk dialects.
JRuby is a 100% Java implementation of the Ruby programming language running on the Java Virtual Machine (JVM).
Objective-J is a programming language developed as part of the Cappuccino web development framework. Its syntax is nearly identical to the Objective-C syntax and it shares with JavaScript the same relationship that Objective-C has with...
Modern and powerful lisp language written in JavaScript with literal regexes, that hide use of promises, full access to JavaScript, lisp macro system and hygienic macros.
