LyX is a document processor that encourages an approach to writing based on the structure of your documents, not their appearance. It is intended for people people who write and want their writing to look great without tinkering with formatting details, font attributes, or page boundaries. On screen, it looks like any word processor, but it uses the TeX engine for printed output and producing richly cross-referenced PDFs. It is stable and fully featured.
pyPEG is a quick and easy solution for creating a parser in Python programs. pyPEG uses a PEG language in Python data structures to parse, so it can be used dynamically to parse nearly every context free language. The output is a plain Python data structure called pyAST, or, as an alternative, XML.
Template Data Interface (TDI, /ʹtedɪ/) is a markup templating system written in Python with (optional but recommended) speedup code written in C. Unlike most templating systems, TDI does not invent its own language to provide functionality. Instead, you simply mark the nodes you want to manipulate within the template document. The template is parsed, and the marked nodes are presented to your Python code, where they can be modified in any way you want.
pyexpander is a macro processor based on Python. Instead of simple text replacement, it offers evaluation of arbitrary Python expressions and execution of Python code. It features simple syntax definition: all expander commands start with a dollar sign ("$") followed by word characters, parameters, Python code enclosed in brackets, or a combination of these. The full power of the Python programming language can be used, including all operators, functions and modules. Any Python expression can be used to insert text. It also provides a Python library that you can use to develop other macro tools based on pyexpander.
doclifter helps with lifting documents with nroff markup to XML-DocBook. Lifting documents from presentation level to semantic level is hard, and a really good job requires human polishing. This tool aims to do everything that can be mechanized, and to preserve any troff-level information that might have structural implications in XML comments. TBL tables are translated into DocBook table markup, PIC into SVG, and EQN into MathML (relying on pic2svg and GNU eqn for the last two).
OOoPy is a Python library for modifying OpenOffice.org documents. It provides a set of transformations on the OOo XML format using the ElementTree XML Library. Transformations included are a mail merge application and the concatenation of documents with formatting intact. The framework supports easy creation of new transformations.