Python IDE for beginners
IntelliJ IDEA & IntelliJ Platform
A free C, C++ and Fortran IDE
A powerful editor and graphical debugger for code written in Scilab
Komodo Edit is a fast and free multi-language code editor
Lightweight, cross-platform & full-featured shader IDE
A lightweight programming environment for Java
BASIC language interpreter (multiplatform)
The professional, open source development tool for the open web
Second Life script editor.
Graph algorithms interpreter, IDE, debugger, 3D visualizations.