jEdit is a mature programmer's text editor with hundreds (counting the time developing plugins) of person-years of development behind it. To download, install, and set up jEdit as quickly and painlessly as possible, go to the Quick Start page.

Features
1. Combines the best functionality of Unix, Windows and MacOS text editors.
2. Runs on any operating system with a Java 2 version 1.3 or higher virtual machine - this includes MacOS X, OS/2, Unix, VMS and Windows.
3. Efficient keyboard shortcuts for everything
4. Comprehensive online help
5. Unlimited undo/redo
6. Copy and paste with an unlimited number of clipboards (known as "registers")
7. Register contents are saved across editing sessions (4.2)
8. "Kill ring" automatically remembers previously deleted text (4.2)
9. Rich set of keyboard commands for manipulating entire words, lines and paragraphs at a time
10. "Markers" for remembering positions in files to return to later
11. Marker locations are saved across editing sessions
12. Any number of editor windows may be open, each window may be split into several areas, each area can view a different file. Alternatively, different locations in one file can be viewed in more than one area
13. Multiple open windows and split windows are remembered between editing sessions (4.2)
14. Rectangular selection
15. Multiple selection (sometimes known as "discontinuous" or "additive" selection) for manipulating several chunks of text at once
16. Word wrap

Syntax Highlighting. jEdit supports syntax highlighting for more than 130 file types:
ActionScript Ada 95 ANTLR Apache HTTPD APDL AppleScript ASP
Aspect-J Assembly AWK B formal method Batch BBj BCEL
BibTeX C C++ C# CHILL CIL COBOL
ColdFusion CSS CVS Commit D DOxygen DSSSL Eiffel
EmbPerl Erlang Factor Fortran Foxpro FreeMarker Fortran
Gettext Groovy Haskell HTML Icon IDL Inform
INI Inno Setup Informix 4GL Interlis Io Java JavaScript
JCL JHTML JMK JSP Latex Lilypond Lisp
LOTOS Lua Makefile Maple ML Modula-3 MoinMoin
MQSC NetRexx NQC NSIS2 Objective C ObjectRexx Occam
Omnimark Parrot Pascal Patch Perl PHP Pike
PL-SQL PL/I Pop11 PostScript Povray PowerDynamo Progress 4GL
Prolog Properties PSP PV-WAVE Pyrex Python REBOL
Redcode Relax-NG RelationalView Rest Rib RPM spec RTF
Ruby Ruby-HTML RView S+ S# SAS Scheme
SDL/PL SGML Shell Script SHTML Smalltalk SMI MIB SQR
Squidconf SVN Commit Swig TCL TeX Texinfo TPL
Transact-SQL UnrealScript VBScript Velocity Verilog VHDL XML

The license of this software is Free, you can free download and free use this text editor software.