(From The Avid Yahoo User's Group)
Here's WTCC II -- my all-time favorite time calculator.
WTCC II is a four function time code calculator that supports calculations, and conversions, in NTSC, Drop-Frame,
Non Drop-Frame, PAL, Film Feet and Frames, Decimal, Hex and Octal values.
[Computer geeks will be in heaven.]
Additional features of WTCC include a "tape" and conversion between decimal and Roman numerals.
It's easy, simple and very straightforward.
WTCC II -- Time Calculator