Free Sat Nav for mobile phone?

Hi,

I'm looking to upgrade my phone on the Three network and am considering
the Nokia N95 8GB. I noticed this phone has a GPS receiver built in so
I'm wondering of there is any free Sat Nav software I can download for
this phone?
I found a site called www.nav4all.com which appears to have free Sat
Nav software? Are there any others and which is the best?

Thanks




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dickiefunk