StreetSigns 2.5

the author of this app says:

StreetSigns 2.5 is a vector based mapping application designed specifically for the PalmProfessional, PalmIII, and Wordpad. The robust mapping engine allows you to search for street addresses, intersections, and performs contact look-ups right out of the Palm Address Book. Personalize your maps with SignPosts and TrailMarkers, which mark places of specific interest to you.