jEdit is a cross platform, programmer's text editor written in Java. Developed by Slava Pestov and others, jEdit is released under the terms of the GNU General Public License. Features include:

• Runs on any operating system with a Java 1.6 or higher virtual machine - this includes MacOS X, Linux, Unix, VMS and Windows.
• Efficient keyboard shortcuts for everything, with predefined keymaps for Emacs, Intellij IDEA, and OS X (5.0)
• Comprehensive online help
• Unlimited undo/redo
• Copy and paste with an unlimited number of clipboards (known as "registers")
• Register contents are saved across editing sessions
• "Kill ring" automatically remembers previously deleted text
• Rich set of keyboard commands for manipulating entire words, lines and paragraphs at a time
• "Markers" for remembering positions in files to return to later
• Marker locations are saved across editing sessions
• Any number of editor windows may be open, each window may be split into several areas, each area can view a different file and keep track of an independent set of buffers. Alternatively, different locations in one file can be viewed in more than one area
• Multiple open windows and split windows are remembered between editing sessions
• Rectangular selection
• Multiple selection (sometimes known as "discontinuous" or "additive" selection) for manipulating several chunks of text at once
• Word wrap