jEdit is a cross platform text editor written in Java. It has many advanced features that make text editing easier, such as syntax highlighting, auto indent, abbreviation expansion, registers, macros, folding, regular expressions, and multiple file search and replace.
jEdit is free software, and you are welcome to redistribute it under certain conditions. See the GNU General Public License for details.
To download and install plugins, make sure you are connected to the Internet, select Plugins>Plugin Manager from the menu bar of the editor window, and click Install New Plugins in the dialog box that appears.
Firewall settings can be configured in the Plugin Options>Firewall pane of the Utilities>Global Options dialog box.
For more information, read the documentation accessable from the tree on the left. In particular, check out:
To keep up to date in the world of jEdit, visit the jEdit web site (www.jedit.org) regularly, and subscribe to the mailing lists.