A free integrated development environment (IDE) for Perl with multiple tools for writing and debugging your scripts. It features multiple CGI scripts for editing, running, and debugging; multiple input files; full server simulation; queries created from an internal Web browser or query editor; test MySQL, MS Access scripts; interective I/O; directory window; code library; and code templates. Perl Express allows you to set environment variables used for running and debugging script. It has a customizable code editor with syntax highlighting, unlimited text size, printing, line numbering, bookmarks, column selection, a search-and-replace engine, multilevel undo/redo operations, and so on.