A proprietary format owned by Adobe until 2008, when it was released and relicensed as an ISO standard.
Free software tools that work with PDF
apt-get install poppler-utils
pdftocairo -png mydoc.pdf
Creates a series of PNG files.
Python tools to manipulate / generate PDF
An example using reportlab (see http://stackoverflow.com/questions/2252726/how-to-create-pdf-files-in-python)
from reportlab.pdfgen import canvas from reportlab.lib.units import inch, cm c = canvas.Canvas('ex.pdf') c.drawImage('ar.jpg', 0, 0, 10*cm, 10*cm) c.showPage() c.save()