There are many like navigon, ndrive, sygic etc with India maps. Even there is a workaround to make google maps works with navigation in India.
I am new to this forum, registered just now. Dont know about the forum rules. Some forums dont allow to post friendly (cracked) apps. Some forums wont allow to post apps of certain developers like tomtom, gameloft, ea etc. If we can post links here in this forum I will upload or give direct links to all navigation apps here.