jedit

jEdit is a cross-platform programmer's text editor written in Java.
Some of jEdit's features include:

Built-in macro language (BeanShell).
Extensible plug-in architecture with more than 80 plug-ins
 available.
Plug-ins can be downloaded and installed from within jEdit using
 the plug-in manager feature.
Syntax highlighting for more than 80 languages.
Supports a large number of character encodings including UTF8 and
 Unicode.
Auto-indenting of source code.
Folding (indent and marker based).
Word wrap.
Unlimited undo and redo.
Highly configurable and customizable.
Every other feature, both basic and advanced, that you would expect

to find in a text editor.

          

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License: GPL-2.0+
URL: http://www.jedit.org/