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Tiny RML2PDF is a component of the Open Report project. It can be used with the Tiny Reporting Server to have a complete solution to render PDF file on the fly.

QPDF is a program that can be used to linearize (web-optimize), encrypt (password-protect), decrypt, and inspect PDF files from the command-line. It does these and other structural, content-preserving transformations on PDF files, reading a PDF file as input and creating a new one as output. It also provides many useful capabilities to developers of PDF-producing software or for people who just want to look at the innards of a PDF file to learn more about how they work. QPDF understands PDF files that use compressed object streams (supported by newer PDF applications) and can convert such files into those that can be read with older viewers. It can also be used for checking PDF files for structural errors, inspecting stream contents, or extracting objects from PDF files. QPDF is not PDF content creation or viewing software -- it does not have the capability to create PDF files from scratch or to display PDF files.

rtf2latex2e is a program that translates RTF (rich text format) files into LaTeX files. It translates text formatting, tables, figures, and equations. The resulting LaTeX files are quite readable and suitable for editing.

Firmware and binary drivers for some HPLIP supported printers.

Small utility designed to regenerate the GNU info page indexes

Libmspub is library providing ability to interpret and import Microsoft Publisher content into various applications.

The rprint utility establishes a bidirectional raw TCP connection to a network printer, usually on port 9100. In case of PostScript(TM) printers, rprint may be directed to query the printer for accounting and printer status information. Although rprint can be used interactively, too, it is normally be invoked by an lpd input filter program.

A simple library to read Adobe Font Metrics files and use the data conveniently

color-tools is a Ruby library to provide RGB, CMYK, and other colourspace support to applications that require it. It also provides 152 named RGB colours. It offers 152 named RGB colours (184 with spelling variations) that are commonly supported and used in HTML, SVG, and X11 applications. A technique for generating a monochromatic contrasting palette is also included.

The capabilities of the Color library are limited to pure mathematical manipulation of the colours based on colour theory without reference to colour profiles (such as sRGB or Adobe RGB). For most purposes, when working with the RGB and HSL colours, this won't matter. However, some colour models (like CIE L*a*b*) are not supported because Color does not yet support colour profiles, giving no meaningful way to convert colours in absolute colour spaces (like L*a*b*, XYZ) to non-absolute colour spaces (like RGB).