termdown is a big text timer using pyfiglet for FIGlet-like text, it can count down or be used as stopwatch.
./termdown.py 5 --title termdown --text "Time's Up!" --font computer
You can specify the time by seconds or something like 13:45 or 1h 23m 45s. Also a few keys, such as Space to pause the timer.
A set of various options, you can let screen blink when times up, render seconds in red, choose different pyfiglet font, hide seconds until last minute, show a title text and/or end text, speak the second if on Mac OS X, or not to use ASCII art text.
termdown was created by Torsten Rehn, et al. on 2014-05-26, written in Python 2/3 with pyfiglet under GPLv3, currently git-6602526 (2016-01-07, post v1.9.0 (2015-10-24))