Good tools to monitor SERP positions?

[Presnus]

Do you guys know a good tool for monitoring SERP positions?

I would rather have an online tool, or a good offline tool for mac.

I already know SEOMOZ (but that's only for 5campaigns)

[Naughty]

We also need similar stuff, also a keyword tracker to see what ranks where on which keywords. For Dutch market too, thanks;-))

[whyalwaysme]

gserp dot com

[O MARINA]

Here you go
www.rankcheckerace.com