/usr/bin/tblcvt
/usr/bin/tc2html
/usr/bin/tc2html-toc
/usr/bin/tc2null
/usr/bin/tc2rtf
/usr/bin/tc2text
/usr/bin/troff2html
/usr/bin/troff2null
/usr/bin/troff2rtf
/usr/bin/troff2text
/usr/bin/troffcvt
/usr/bin/unroff
You may install this package on Debian with
apt-get
install troffcvt