There is no single comprehensive list of professional uses, most lists don't distinguish between professional and hobbyist projects. However, the wiki has lists of
- (web) services: [List of OSM based
Services][1]
- websites using OSM: [OSM Internet links][2] (German)
links][2], more comprehensive [German equivalent][3]
- desktop applications: [Software/Desktop][3]
[Software/Desktop][4]
- mobile applications: [Mobile phones][4], [Android][5],
phones][5], [Android][6],
[iPhone][6], [iPhone][7], ...
- other lists of applications, classified by platform or category:
[Software][7]
[Software][8]
- consulting companies: [List of Companies offering OSM Consulting][8]
Consulting][9]
- scientific projects and publications: [Research][9]
[Research][10]
[1]: http://wiki.openstreetmap.org/wiki/List_of_OSM_based_Services
[2]: http://wiki.openstreetmap.org/wiki/OSM_Internet_Links
[3]: http://wiki.openstreetmap.org/wiki/DE:OSM_Internet_Links
[3]: [4]: http://wiki.openstreetmap.org/wiki/Software/Desktop
[4]: [5]: http://wiki.openstreetmap.org/wiki/Software/Mobile_phones
[5]: [6]: http://wiki.openstreetmap.org/wiki/Android
[6]: [7]: http://wiki.openstreetmap.org/wiki/IPhone
[7]: [8]: http://wiki.openstreetmap.org/wiki/Software
[8]: [9]: http://List_of_Companies_offering_OSM_Consulting
[9]: [10]: http://wiki.openstreetmap.org/wiki/Research
