Vector metro (subway) map for calculating route and getting information about transport nodes.
Its GPL project for creating analog of pMetro (Muradov B.)
About 200 maps of subways are available:
http://translate.google.com/translate?sl=ru&tl=en&u=http://pmetro.su/Maps.html
(Maps have an open format and can easily be edited or created)
App available for many platforms:
https://www.linux-apps.com/content/show.php?content=146249
Also available for Symbian:
http://qmetro.sf.net/mobile/
http://nokia-5235-comes-with-music.sigma.apps.bemobi.com/ru_ru/qmetro_subway_maps_of_world.html?pos=1
I don't drink beer, but you can fund me a coffee :)