A great tool for solving all of those compelling problems on that famous Channel 4 programme - now you can keep up with Carol and the rest of that team! Countdown Cracker also plays the game and a few other games too - set your own challenges.
SoftSpot Software
Absolutist
PAWSoft
Tom Kring
Alexander Gorlach
HideSecret.com
Altix Soft
Realore Studios
IOframe Software
Liberty Street Software
Mark Wallace
Ponomarenko Ivan
G.U.E.S.
Shift Schedules