There is an archive at github.com with most classical roff papers in clean .pdf.gz format. It contains the papers recited in troff.org and has some rare ideal documentation. The archive is available at:
$ git clone https://github.com/RUNOFF/classical_roff_papers.git The archive with RUNOFF documentation and files written in RUNOFF is available at: $ git clone https://github.com/RUNOFF/RUNOFF.git Enjoy Bernd Warken