----  city_house1.mesh
old building from the fifties no. 3
Author: DennisH2010
License: CC-BY
http://www.blendswap.com/blends/view/67727

----  city_house2
Old building from the fifties no. 2
Author: DennisH2010
License: CC-BY
http://www.blendswap.com/blends/view/67817

----  city_house3, _big
City Building
Author: victorbied1
License: CC-BY
http://www.blendswap.com/blends/view/71056

----  city_house4, _tall
NYC apartment building 
Author: Reino
License: CC-BY-SA
http://www.blendswap.com/blends/view/73728

----  city_shop
Supermarket
Author: KainEden
License: CC-BY 3.0
http://opengameart.org/content/supermarket

----  skyscraper1..12
12 Buildings
Author: raytrace
License: CC-BY
http://www.blendswap.com/blends/view/69593

textures used:
Calinou's high-resolution texture pack (with normal maps)
Author: Calinou
License(s): CC-BY-SA 3.0
http://opengameart.org/content/calinous-high-resolution-texture-pack-with-normal-maps

----  alien_*
Alien-building/base set
Author: rubberduck
License(s): CC0
http://opengameart.org/content/alien-buildingbase-set
textures by nobiax/yughues, CC0