Moonshiner is a graphical frontend for Ghostscript's PostScript-to-PDF converter. While Ghostscript (and its wrapper ps2pdf) is a very powerful instrument, it is quite challenging to use its parameters on the command line, especially if you often change the settings as to what kind of color conversion, image resampling, etc. you want Ghostscript to perform. While the author has never used Adobe's Distiller, and thus cannot really compare the two, Moonshiner (as the name suggests) is supposed to be a work-alike for the Linux world (at least GUI-wise, as the actual work is of course done by Ghostscript).
pdfposter can be used to create a large poster by building it from multple pages and/or printing it on large media. It expects as input a PDF file, normally printing on a single page. The output is again a PDF file, maybe containing multiple pages together, thus building the poster. The input page will be scaled to obtain the desired size. This is much like poster does for Postscript files, but works with PDF instead, since sometimes poster does not like your files converted from PDF. Indeed, pdfposter was inspired by poster.
xhtml2pdf converts HTML/XHTML/XHML to PDF using the ReportLab Toolkit, the HTML5lib, and pyPdf. It supports HTML 5 and CSS 2.1 (and some of CSS 3). The main benefit of this tool that a user with Web skills like HTML and CSS is able to generate PDF templates very quickly without learning new technologies.
PyKotIcon is a generic, extensible, networked, cross-platform dialog box manager. It is often used as an end user companion for the PyKota print accounting system, but is completely independent. Its remotely accessible API is well documented, so using it from your own application is easy. It can display informational messages, optionally ask for confirmation or cancellation, and can also create and display free content input forms over the network.
HPLIP (HP Linux Imaging and Printing) is a complete single and multi-function printing device connectivity solution for users of Linux. Supported features include a toolbox with status and maintenance functions, scanning, a CUPS backend that supports bidirectional I/O, and photo card unloading. It includes HPIJS 2.x and supports over 1000 HP printer models including Deskjet, Business Inkjet, Photosmart, Business Inkjet, PSC, Officejet, Mono/Color LaserJet, and LaserJet Multifunction Peripheral (MFP).