The Context Help plugin is a framework for integrating jEdit mode dependent (i.e. java, xml, php,...) beanshell scripts into jEdit. In particular the plugin contains beanshell examples for calling windows help files for java, javascript and php.

The DragAndDrop plugin allows files to be opened in jEdit by simply dragging them into the text area from a file manager, desktop, or other application. Does not work on all combinations of platform/JDK.

HartMath is a computer algebra tool. Features are: Big Number Arithmetic; Symbolic Computations, Derivatives, Expands, Polynomials, Vectors, Matrices; List Functions: Append, Prepend, Map, Apply, Table; Plot Functions; Numeric Functions; Pattern Matching Rules; Pure functions

The JIndex plugin enables jEdit to show the JavaDoc API html documentation for the currently selected word, with a single key press, in a browser of your choice.

The JStandard plugin checks a buffer containing Java source code for compliance with JavaSoft's Coding standards.

The RETest plugin provides a simple, yet powerful interface for testing regular expressions.

The SendBuffer plugin allows you to send the contents of the current buffer using the SMTP protocol.

The Sessions plugin maintains lists of open files - called sessions (aka workspaces) - and offers some functions to switch between them.