Launch an external diff tool like WinMerge in Eclipse
Eclipse plugin for VCS ClearCase
A simple Bash IDE / Debugger
EditBox is the Eclipse plugin for source code background highlighting.
An IDE for Clojure
Open-source plugins included in the distribution of IntelliJ IDEA
Text-based IDE for the Java programming language
A lightweight programming environment for Java
Performance and Productivity at Scale
Vim-like editing in Eclipse
ZKCC is a netbeans java code completion plugin for zul files.
Codenvy
Literate programming for eclipse
Simple Web-based environment for PHP scripting in programming class