XMLStarlet is a set of command line utilities which can be used to transform, query, validate, and edit XML documents. XPath is used to match and extract data, and elements can be added, deleted or modified using XSLT and EXSLT.

XML::Feed is a syndication feed parser for both RSS and Atom feeds. It also implements feed auto-discovery for finding feeds, given a URI. XML::Feed supports the following syndication feed formats: RSS 0.91, RSS 1.0, RSS 2.0, Atom

FreeXL is a C library to extract valid data from within an Excel (.xls, .xlsx) or LibreOffice (.ods) spreadsheet.

HTML-XML-utils provides a number of simple utilities for manipulating and converting HTML and XML files in various ways. The suite consists of the following tools:

• asc2xml convert from UTF-8 to &#nnn; entities

• xml2asc convert from &#nnn; entities to UTF-8

• hxaddid add IDs to selected elements

• hxcite replace bibliographic references by hyperlinks

• hxcite mkbib - expand references and create bibliography

• hxclean apply heuristics to correct an HTML file

• hxcopy copy an HTML file while preserving relative links

• hxcount count elements and attributes in HTML or XML files

• hxextract extract selected elements

• hxincl expand included HTML or XML files

• hxindex create an alphabetically sorted index

• hxmkbib create bibliography from a template

• hxmultitoc create a table of contents for a set of HTML files

• hxname2id move some ID= or NAME= from A elements to their parents

• hxnormalize pretty-print an HTML file

• hxnsxml convert output of hxxmlns back to normal XML

• hxnum number section headings in an HTML file

• hxpipe convert XML to a format easier to parse with Perl or AWK

• hxprintlinks number links and add table of URLs at end of an HTML file

• hxprune remove marked elements from an HTML file

• hxref generate cross-references

• hxselect extract elements that match a (CSS) selector

• hxtoc insert a table of contents in an HTML file

• hxuncdata replace CDATA sections by character entities

• hxunent replace HTML predefined character entities to UTF-8

• hxunpipe convert output of pipe back to XML format

• hxunxmlns replace "global names" by XML Namespace prefixes

• hxwls list links in an HTML file

• hxxmlns replace XML Namespace prefixes by "global names"

The lxml XML toolkit is a Pythonic binding for the C libraries libxml2 and libxslt.

XML::TokeParser provides a procedural ("pull mode") interface to XML::Parser in much the same way that Gisle Aas' HTML::TokeParser provides a procedural interface to HTML::Parser. XML::TokeParser splits its XML input up into "tokens", each corresponding to an XML::Parser event.

This module provides ways to parse XML documents. It is built on top of XML::Parser::Expat, which is a lower level interface to James Clark's expat library. Each call to one of the parsing methods creates a new instance of XML::Parser::Expat which is then used to parse the document. Expat options may be provided when the XML::Parser object is created. These options are then passed on to the Expat object on each parse call. They can also be given as extra arguments to the parse methods, in which case they override options given at XML::Parser creation time.

YAWriter implements Yet Another XML::Handler::Writer. It provides a flexible escaping technique and pretty printing.

XML::Twig is an XML transformation module. Its strong points: can be used to process huge documents while still being in tree mode; not bound by DOM or SAX, so it is very perlish and offers a very comprehensive set of methods; simple to use; DWIMs as much as possible.

What it doesn't offer: full SAX support (it can export SAX, but only reads XML), full XPath support (unless you use XML::Twig::XPath), nor DOM support.

Libxml2 is the XML C parser and toolkit developed for the Gnome project (but it is usable outside of the Gnome platform).

pugixml is a C++ XML processing library, which consists of a DOM-like interface with rich traversal/modification capabilities, a fast XML parser which constructs the DOM tree from an XML file/buffer, and an XPath 1.0 implementation for complex data-driven tree queries. Full Unicode support is also available, with Unicode interface variants and conversions between different Unicode encodings which happen automatically during parsing/saving.

Libxslt is an XSLT C library developed for the GNOME project. It is based on libxml for XML parsing, tree manipulation and XPath support.

This package provides a Python library to convert XML to OrderedDict.

This package provides an XML Schema and its catalog. The schema constrains the syntax of xml:lang, xml:spec, xml:base, and xml:id in the schema language defined by the XML Schema Recommendation Second Edition of 28 October 2004.

Xerces-C++ is a validating XML parser written in a portable subset of C++. Xerces-C++ makes it easy to give your application the ability to read and write XML data. A shared library is provided for parsing, generating, manipulating, and validating XML documents using the DOM, SAX, and SAX2 APIs.

This module has a very simple task - to be a base class for PerlSAX drivers and filters. Its default behaviour is to pass the input directly to the output unchanged. It can be useful to use this module as a base class so you don't have to, for example, implement the characters() callback.

pugixml is a C++ XML processing library, which consists of a DOM-like interface with rich traversal/modification capabilities, a fast XML parser which constructs the DOM tree from an XML file/buffer, and an XPath 1.0 implementation for complex data-driven tree queries. Full Unicode support is also available, with Unicode interface variants and conversions between different Unicode encodings which happen automatically during parsing/saving.

libebml is a C++ library to read and write EBML (Extensible Binary Meta Language) files. EBML was designed to be a simplified binary extension of XML for the purpose of storing and manipulating data in a hierarchical form with variable field lengths.

The XML::Simple module provides a simple API layer on top of an underlying XML parsing module (either XML::Parser or one of the SAX2 parser modules).

This package provides a Cleaner for cleaning up HTML pages. It supports removing embedded or script content, special tags and CSS style annotations among other features. Its main purpose is removing superfluous content, it is not appropriate for security sensitive environments.

This is an XML writer that understands SAX2. It is based on XML::Handler::YAWriter.

Xmlto is a front-end to an XSL toolchain. It chooses an appropriate stylesheet for the conversion you want and applies it using an external XSL-T processor. It also performs any necessary post-processing.

Libxlsxwriter is a C library that can be used to write text, numbers, formulas and hyperlinks to multiple worksheets in an Excel 2007+ XLSX file.

Mini-XML is a small C library to read and write XML files and strings in UTF-8 and UTF-16 encoding.