Is there any open source GPS navigation software for laptop?
I require an open source software that has has TeleAtlas or Navteq as map data provider, and feature is almost same with iNav iGuidance.

Please help.

It would sure help, if you were comfortable sharing details about your intended use. The guys on the forum are very gracious with their expertise and can really help. They even understand that, if you are developing something that is proprietary, you may not be able to share all the specifics. However, they really need some information to be able to point you in the right direction.
Ken in Regina
"Open source" is frequently used as a synonym for "free".

In any case, I'm not aware of any open source projects that use proprietary data from Navteq or TeleAtlas. Open source projects tend to also use open sources of data, like OpenStreetMaps.

Your search engine is your friend. Try something like "open source navigation software".

How is the comparison between the two map providers?
Actually, I'm looking for GPS software that provides map sound navigation and some standard features.

Besides, it also provide from to route map.

Last, any comparable software like iNav iGuidance.
There isn't any. You can try Navit, which has some navigation features, but is very complicated to set up. A new project called modRana is in the works but it is far from being complete.

You can find almost all available free GPS SW on this site: Free GPS Software - An Up-to-Date List
Thanks. About