Elvis is a clone of vi/ex, the standard UNIX editor. Elvis supports nearly all of the vi/ex commands, in both visual mode and ex mode. Elvis adds support for multiple files, multiple windows, a variety of display modes including "hex" and "html", on-line help, WYSIWYG printing, and other miscellaneous extensions.
The PyGE project aims to provide free cross-platform desktop applications to make the growing collection of copyright-free literary works from Project Gutenberg more accessible to the typical computer user. The suite includes PyGETS, a program for searching and downloading available PG e-texts, PyGEMZ, a program for converting e-texts to a format suitable for both desktop and Palm PDA usage, and PyGERS, a program for comfortably viewing e-texts which includes basic text-to-speech capabilities.
Text::Template is a module for doing dynamic content generation in Perl. You can embed any Perl code into a file, and then make a call to the module to `fill in' the blanks in the file. This is good for generating HTML pages and form letters. It was first released in 1995 and is very stable, very fast, and very reliable. It is also integrated with Perl's Safe module in case you don't trust the template author.
a2pdf converts plain (ASCII) text files to documents in the PDF format. Its features include optional line/page numbering, multiple font support, syntax highlighting for Perl source code, and customizable headers and footers. Binaries are available for Linux x86, Mac OS X (Intel), and Microsoft Windows platforms.
The config_cfe Perl module contains functions that ease updating small text files, usually configuration files. It is easy to write small scripts that can do editing in 'batch mode', a necessary thing when updating many hosts at the same time. There is a simple program, update-cfe, that can be used in shell scripts (sometimes update-cfe is enough to update a section in a file).