Like fortune(6), tfortune is a Unix command line utility which prints a random epigram. Epigrams are stored as plain text files, but they must be annotated with tags to make full use of the features which tfortune offers over other implementations.

Tfortune has a built-in matching language for epigrams. User-supplied tag expressions define subsets of admissible epigrams. If a tag expression is given, epigrams are picked from the admissible subset only.