Haxe is a multi-platform strictly typed object-oriented programming language. It can be compiled both to Javascript and JVM bytecode.
Robert Tolksdorf
Processing.js
Processing.js is the sister project of the popular Processing visual programming language, designed for the web. Processing.js makes your data visualizations, digital art, interactive animations, educational graphs, video games, etc. work using web standards and without any plug-ins.
Gremlin
Gremlin is a domain specific language for traversing graphs. Graphs are data structures where there exists vertices (i.e. dots, nodes) and edges (i.e. lines, arcs). Gremlin was designed to work with a type of graph called a property graph. Property graphs are defined, in detail, in the Defining a Property Graph section of this documentation. By using Gremlin, it is possible make use of a REPL (command line/console) to interactively traverse a graph.
Blockly
Blockly is a web-based, graphical programming editor. Users can drag blocks together to build an application.
substandard-lisp
A simple implementation of Standard Lisp written in JavaScript.
javascript2me
This is a Java-based JavaScript interpreter which runs smoothly in any J2ME phones. The binary size of the core engine is less than 25K (obfuscated & JAR’ed) with full (almost) js language feature included. It can be integrated into any J2ME apps.
yaji
yaji is Yet Another Javascript Interpreter written in Java.
tigc
Compiler for the Tiger Programming Language. From the reference manual on Tiger: “This document describes the Tiger language defined in Andrew Appel’s book Modern Compiler Implementation in Java (Cambridge University Press, 1998). The Tiger language is a small, imperative language with integer and string variables, arrays, records, and nested functions. Its syntax resembles some functional languages.”
tortuguita
tortuguita is a Logo interpreter implemented in Java
Frege
Frege is a non-strict, pure functional programming language in the spirit of Haskell. It enjoys a strong static type system with type inference. Higher rank types are supported, though type annotations are required for that. Frege programs are compiled to Java and run in a JVM. Existing Java Classes and Methods can be used seamlessly from Frege. Frege is not a Haskell dialect, though some effort has been expended to make it look and feel like so.