Hexadecimal Utilities v1.0
(C) 2000 Kevtiva Interactive
TI-83 BASIC

The programs are contained in hex.83g.
They are pretty self-explanatory.

-Very fast.
-Very compact.
-Will work even with HUGE numbers (unless ERR:OVERFLOW).

Visit http://www.kevtiva.com/ and click 'spleenworks'.