My primary interest in OSM was routing. OSM-data should be wildly used in navigation software.
I maintained conversion of OSM data to Cityguide format and related QA tools:
These tools are currently stopped, but source code is available on github: https://github.com/zkir/Osm2Dcm . Feel free to use it.
You also can contact me here: https://vk.com/nefuraito
My message on the forum: https://forum.openstreetmap.org/search.php?action=show_user_posts&user_id=2739
Interview with me: