gdiffmk for producing diffs of groff files.

glilypond for integrating lilypond musical notation into grof files:

$ glilypond --pdf2eps -t ./b -- example.1 > example.ps.1

$ groff -p -Tps example.ps.1 > out.ps

$ okular out.ps

The **grap2graph** command to convert grap graphs to a bitmap. This requires

the **grap** command, which does not ship with Slackware.

$ cat internet.d | grap2graph -format jpg -density 300 > my.jpg

The **grn** command is a preprocessor for Gremlin files. It appears to be non-

functional, but it's possible that an additional back-end is required.

The **grodvi** command converts Groff to DVI for TeX. It's basically a

shortcut for

groff -Tdvi

.

Have your computer guess what groff command you need with **grog**

$ grog blah.1

groff -man blah.1

$ grog -Thtml blah.1

groff -Thtml -man blah.1

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