schedtool, toolsched and interbench packages available here
(add to sources.lst):

deb http://users.tpg.com.au/sigm/debian sid main
deb-src http://users.tpg.com.au/sigm/debian sid main

For contest and interbench:
For Sarge (stable):
deb http://packages.kirya.net/debian/ stable main contrib non-free
deb-src http://packages.kirya.net/debian/ stable main contrib non-free

For Sid (unstable):
deb http://packages.kirya.net/debian/ unstable main contrib non-free
deb-src http://packages.kirya.net/debian/ unstable main contrib non-free

For experimental:
deb http://packages.kirya.net/debian/ experimental main
deb-src http://packages.kirya.net/debian/ experimental main