tbibtools provide a simple regexp-based BibTeX parser that can be used to sort bib files, reformat bib files, list keys in a bib file, and show bib entries matching a regular expression. It is available as both a script and a VIM plugin. It makes a few assumptions about how a bib file should look like.
Aquamacs is a Mac-like version of the powerful Emacs text editor that runs as a standard OS X application. It features extensive customization that enables it to conform better with Apple's standard Human Interface Guidelines (HIG) than standard versions of the editor do. It provides a more Mac-like user experience than Carbon Emacs.
dvdmenuauthor makes it easy and efficient to author a DVD with menus in an indirect (non-WYSIWYG) way. An XML project file drives the DVD authoring, from which both menus and a dvdauthor XML file are generated. dvdauthor and spumux are then used to author the DVD filesystem. Menu items (buttons and static items such as images and text) can be specified conscisely in the project XML file with LaTeX markup (to be processed by pdfLaTeX and rendered by xpdf).
VRR is a vector image editor designed especially (but not only) for making illustrations of mathematical articles. Its main features are many types of geometric objects and keeping of their dependencies, cooperation with TeX, scripting in Scheme, real-size dimensions, support for a wide range of file formats (including PS, EPS, PDF, and SVG).
Papyrus is a XML-based reporting langauge for PostgreSQL and MySQL. It allows you to generate well-formatted reports in LaTeX, PDF, PostScript, HTML, ANSI, and XML. The XML is expressed in a formatting-oriented style to allow you to develop a wide range of reports. SQL is then embedded into the report to give you the desired data. Papyrus is commandline-driven, and data arguments can be passed into the report. Equations and expressions can also be carried out on data.