Poppler islibrarified PDFrenderingtoolkit derivedfrom the Xpdf3.0 code base.It can utilizeX11-independentrenderingbackends likeCairo, Splash,or Qt4 Arthur.It's notdesigned forplatform-agnosticy,but properBSD/Linuxintegration; isused by variousPDFapplications(Evince,Okular,TeXStudio,pdftotext,Zathura,Xournal,Inkscape), andcomes with aset ofcommand-linetools of itsown.
CommonMark.jsis a referenceimplementationfor JavaScript.(And a Cversionavailable aswell). Itparses thedocumentformat,provides amodifyableabstract syntaxtree, and canrender to HTML,XML, or perDOM. It'salso readilyavailable asNPM/io.jsmodule.
Geomview is aninteractive 3Dviewing programfor Unix.Geomview letsyou view andmanipulatethree-dimensionalobjects: youuse the mouseto rotate,translate, zoomin and out, andso on. Geomviewcan be used asa standaloneviewer forstatic objectsor as a displayengine forother programswhich producedynamicallychanginggeometry.Geomview candisplay objectsdescribed in avariety of fileformats.Geomview comeswith a wideselection ofexampleobjects, andyou can createyour ownobjects