Hi tradewin,
I personally don't spreadbet, but I would say the best tool to assist with money management is YOU.
That might sound a bit corny, but in my view there are many software packages available which claim to help you out with sophisticated "money management methods" that you really don't need.
As I see it, money managment really involves 3 main elements: where you set your stop losses, where you take your profits, and how much money you "bet" on each trade.
These are things you can work out yourself without needing to spend money on programs or similar.
It's good that you are thinking about Money Management before trading for real as good money managment is the difference between success and failure for a lot of traders.
Good Luck,
Damian