teamtimer is a script which allows people on the same team to "share" a timing clock on between their machines. It allows anyone on the team to start the clock at an arbitrary time by typing
!start <value>into the team chat window. When someone using this script receives that teamchat message, the counter window will popup and start counting from
Thanks to Runar, who's *HUD.vl2's provided the bulk of the code used in this script.