Hi Eva,
I do use BetBotPro for placing our selections, which are done manually.

BFManager is the stronger bot of the two & they cost about the same.
It can do a number of extra things, like, only laying the 3rd Fav if its price blows 20%+ in the market.

Another is The Bet Engine.

There is a Free Bot available called BetSoftPro .

These are all bet placement tools, so you dont have to sit in front of the screen all day.

There is a manual bet placement tool called Jet Bet (Free)
Its interface is a lot easier & quicker to use than Betfairs interface.

There is a site that specialises in discussing all types of Bots on the market called Bot4Us

If you want a Hosting service to run your Bot 24/7 instead of using the resources of your own computer ,then the most cost effective one to use for this application is ...
VPS MyHosting.com

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Cheers.