2023-07-24 Antenna House has released AH Formatter V7.3. It supports formatting and rendering of documents using CSS for Paged Media. It includes supports for HTML, SVG and MathML. Complete standard conformance information as well as a comprehensive feature list can be found on the product page.

2022-07-07 RealObjects released PDFreactor version 11.4.8, an HTML-to-PDF (and XML-to-PDF) formatter that runs either as a Web service or as a command line tool. It is also available as a Java library. It has support for, among other things, CSS Transforms, CSS Regions, Web Fonts, and running elements. Other features include support for HTML5, MathML, SVG, XSLT, JavaScript, PDF/A and accessible PDF. Version 11 adds, among other things, support for CSS grid, page floats, custom counter styles and OpenType ligatures. (Java. Free demo version.)

2019-09-30 BFO released Big Faceless Report Generator version 1.1.70, an XML-to-PDF converter that uses CSS (level 2) for styling. It has its own XML vocabulary for making graphs. Can also be used as a Java servlet or as a library inside Java programs. Output can optionally be in PDF/A or PDF/UA.

2018-11-12 Kozea published Weasyprint version 43, a converter from HTML + CSS to PDF. (Open Source, Python)

2017-11-22 Daniel Glazman of Disruptive Innovations released version 3.01 of BlueGriffon, a WYSIWYG Web editor with support for HTML, MathML, SVG and CSS (full level 2 and parts of level 3). Paying versions add additional functions, such as EPUB creation, predefined templates, HTTP PUT support, visual CSS editor, MathML editor, project manager and responsive design mode. (Linux, Windows, Mac; Open Source)

2016-10-18 AI Internet Solutions released version 16 of CSE HTML Validator, an HTML editor that validates HTML, CSS and/or PHP code, with integrated syntax checker, spell checker, link checker, accessibility checker, SEO and more. (Windows, free ‘Lite’ version, Standard/Pro/Enterprise versions with free trial)

2016-01-18 CodeLobster publishes the CodeLobster PHP Edition version 5.8.1, an IDE for HTML, CSS, PHP and JavaScript, with code highlighting, debugger, auto-complete, etc., and built-in support for several CMS'es (SVN, Git, SASS, LESS, Drupal, Joomla, Wordpress, Symfony, etc.). (Windows; free version (without CMS support), Lite version and Professional version)

2015-10-21 shakespeare is a Haskell library that provides a template system for generating CSS style sheets (and other types of files). (Open Source)

2015-10-21 cssmin is a CSS “minifier” as a Ruby library. (Ruby. Open Source)

2015-10-21 clean-css is a “minifier” for CSS files (written in JavaScript, requires node.js) (Open Source)

2015-10-21 SyncRO Soft released version 17.1 of the <oXygen/> XML Editor with improved support for CSS, DITA 1.3, XLIFF 2.0 and more. It supports CSS (WYSIWYG editing), XSL-FO, XSLT, XQuery, various XML- or XHTML-based formats (such as EPUB, TEI, DocBook and DITA) and also has an SVG viewer. (Runs on Java and/or Eclipse platforms, free trial.)

2015-10-21 CSSTidy can do some rewriting on CSS style sheets, to “minify” them, rewrite longhand properties as shorthands, remove indentation, etc. (PHP or C++. Open Source)

2015-10-21 CSSOM.js is a CSS parser written in JavaScript. (Open Source)

2015-10-21 CSS.pm is an object-oriented Perl library for reading, writing and manipulating CSS style sheets. (Open Source.) There are many more CSS-related Perl modules, see search on CPAN.

2015-03-18 Expected Behavior offers DocRaptor, an online service for creating PDF or XLS (Microsoft Excel spreadsheet) from HTML+CSS documents. The PDF service uses Prince for rendering. The XLS service converts HTML tables, optionally styled with CSS, to Excel spreadsheets. (Free trial)