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.
BHL is an Emacs mode which enables you to convert plain text files into HTML, LaTeX, Texinfo, SGML (Linuxdoc), and TXT files. The BHL mode handles three levels of sections, many sectioning styles, common font-styles, any kind of lists, tables, URLs, horizontal rules, and Wiki names. BHL handles a list of links (lol) and a table of contents (toc): you can browse the lol and the toc, insert them where you want, and update the sections' numbers with one keystroke.
GXPARSE is not a new XML parser, but is an additional processing layer that makes it much easier to use event-based parsers like the SAX parser. It supports both direct sequential output and random access output (via the Resequencer interface). The random access mode delays output until all input has been processed, but makes it much easier to handle ID/IDREF attributes. GXPARSE maintains most advantages of the event-based parser. Application development and maintenance is considerably easier, but processing is a little slower.
Nabu is a simple framework that extracts chunks of various types of information from documents written in simple text files (written with reStructuredText conventions, parsed with docutils) and that stores this information (including the document) in a remote database for later retrieval. The processing and extraction of the document is handled on a server, and there is a small and simple client that is used to push the files to the server for processing and storage. The client requires only Python to work. The presentation layer is left unspecified: you can use whichever Web application framework you like.
CamlTemplate is a library for generating text from templates in Objective Caml. It can be used to generate Web pages, scripts, SQL queries, XML documents, and other sorts of text files. It provides a versatile, easy-to-learn template syntax that supports common scripting-language constructs, while encouraging a separation between presentation logic and application logic. The supported Caml data structures accomodate lists, tables, and trees of items in a straightforward manner. CamlTemplate works well with mod_caml and mod_fastcgi, supports any ASCII-compatible encoding, including UTF-8, and includes optional support for multithreading.
Shellac allows you to run powerful UNIX tools within Mac OS X Automator workflows. It includes cat, cut, grep, head, paste, sort, tail, uniq, wc, and more. Aqua controls can be used to tweak any setting of the tool. Plain-language descriptions may be read straight from the Automator interface, and tooltips are provided. Tools may be found by their UNIX names. Either explicit text, files, or folders are accepted as input. It is packaged as a self-contained application for easy installation.