It is useful to be able to take a bunch of image files and assemble them into a single PDF file. Tumble is a utility written by Eric Smith in 2003 for doing this. The problem is that it does not build correctly on FreeBSD. But with minor hacking, it does work. I am providing a tarball of the slightly mimimally modified code that works on FreeBSD 6.2. Really, it is just the makefile that is the problem. Somebody should just rewrite his makefile. Also, he mentions that Tumble only works on little-endian machines like x86. That is probably not too hard to fix, but I haven't looked at it and don't plan to. You must use gmake to compile it. That should also be fixed.

tumble for FreeBSD

Update: I no longer use Tumble. I write some scripts that achieve the same thing using pdflatex. Furthermore, if the goal is simply to put images together in a PDF file, you can just use tiff2pdf to make each image into a self-contained PDF file and then use ghostscript to assemble the PDF files into one big PDF file.