Available through Git (Atom feed of changes):
git clone http://offog.org/git/xpopple.git

About xpopple

Xpdf is the de-facto standard suite of tools for displaying and converting PDF files on Unix-like systems. The Poppler project converted and extended Xpdf's core into a library that other programs could use. Tools like Evince and Zathura now use Poppler for high-quality PDF rendering. However, while Poppler includes the conversion tools (e.g. pdftotext) from Xpdf, it doesn't include the xpdf program itself.

xpopple is the xpdf program — a Motif-based PDF viewer for X11 — adapted to use the Poppler library for rendering. This gives you the classic Xpdf interface, with Poppler's updated rendering facilities.

Why would you want to use xpopple rather than something like Evince? One advantage is the flexible resource-based customisability of the Motif interface; I use xpopple for presentations, and like being able to tweak its appearance and behaviour.

Credits

xpopple is based on the patches from Debian's xpdf package, with some problems fixed (which I've submitted back to Debian), and a small number of additional features (e.g. some extra keybindings).

The original Xpdf was written by Glyph & Cog, LLC. The Debian and Gentoo maintainers did most of the hard work of disentangling xpdf from its library. I've just tidied up a few loose ends and packaged it for other distributions to use.