Basic utitility programs, comprising:
– dvitype, which converts a TeX output (DVI) file to a plain text file (see also the DVI Text Language suite);
– pooltype, which converts a TeX-suite program’s “pool” (string) file into human-readable form; and
– tftopl and pltotf, which convert TeX Font Metric (TFM) file to human readable Property List (PL) files and vice versa.

The author is Donald E. Knuth.