Pharo 4.0

Pharo is a pure object-oriented programming language. It tightly integrates compiler, runtime and a modern IDE focused on being simple to use, provide immediate feedback and inline debugging. It implements a Smalltalk dialect with live objects, hot recompilation, full reflection, dynamic typing, direct inheritance, automated instance and memory management.

LightTable 0.7.2

LightTable is a programmers environment and IDE that features live code execution, instrospective debugging, and instant feedback for modifications. The supported languages are Clojure, JavaScript and Python. It's based on a HTML/JS based runtime, allows to embed anything, work on remotely hosted web apps, very customizable and extensible, and provides a modern interface with memorable shortcuts and tools.