- CUPS-PDF is designed to produce PDF files in a heterogeneous network by providing a PDF printer on the central fileserver. It is available under the GPL and is packaged for many different distributions or can be built directly out of the source files.
- Free • Open Source
- The Pdf It! extension is designed for FireFox and runs on any platform: Windows, Mac OS X and Linux. The Pdf It!
- Free • Proprietary
No longer on Firefox Add-on site and developer site doesn't exist. Still available through legacy add-on sites, for example: http://legacycollector.org/firefox-addons/7528/index.html