Libxslt is a C library for GNOME which allows developers to work with XSLT. It is based on libxml for XML parsing, tree manipulation, and XPath support. Also included is 'xsltproc', a command line XSLT processor. The library is written in plain C, making as few assumptions as possible, and sticking closely to ANSI C/POSIX for easy embedding. It should work on Linux, Unix, and Windows. Though not designed primarily with performances in mind, libxslt seems to be a relatively fast processor. It also include full support for the EXSLT set of extension functions as well as some common extensions present in other XSLT engines.
RefDB is a reference database and bibliography tool for SGML, XML, and LaTeX documents. Command-line tools allow interactive or scriptable access to the data which are stored in a SQL database. RefDB can also be accessed through a Web interface, a SRU interface, or via editor extensions (Emacs/vim). Libraries for Perl and PHP are available for programmers. RefDB provides sophisticated character encoding handling, using Unicode by default.
DocBook is an XML vocabulary which enables you to create document content in a presentation-neutral form that captures the logical structure of the content. Using the DocBook Project XSL stylesheets, you can publish DocBook content as HTML pages and PDF files and other formats, including man pages, HTML Help, and JavaHelp.
sgml2x is a script designed to help applying a DSSSL stylesheet to an SGML or XML document. It has a couple of interesting features, such as multiple possible stylesheets per document class, easy integration of new stylesheets by adding a simple new definition file in a configuration directory (system-wide, per-user, or per-project), and automatic selection of a default stylesheet to be used. It is already set up for DocBook SGML/XML.
AlcoveBook DTD and stylesheets is a strict subset of the DocBook DTD. The ultimate goal is to provide a series of DTDs for enterprise use, commercial proposal, whitepaper, etc. For now, this is one single SGML DTD. The stylesheets are usable with both DocBook and AlcoveBook. They include a set of extensions over Norman Walsh's modular docbook stylesheets (docbook-dsssl), and a book- like layout for articles.
FleXML reads a DTD (Document Type Definition) describing the format of XML documents and produces a validating XML processor with an interface to support XML applications. Because the DTD is known in advance, the C code generated is much more efficient than equivalent code using an API such as SAX.