http://www.iheartvector.com/2008/05/29/city-silhouette-vector/

http://bestdesignoptions.com/?p=2072

http://vector4free.com/vectors/id/100

http://www.freevectors.net/tag/City

http://sideduck.blogspot.com/2008/10/city-silhouette-vector.html

http://www.freevectors.net/tag/Landscape

Color Help
http://cloford.com/resources/colours/500col.htm

Before & After- Designs
http://www.bamagazine.com/?Click=31745

3D Programs (FREE)
http://sketchup.google.com/intl/en/

New Shareware Program
This lets you have a sort of server type space for photos and files that you can then share with other people.
http://www.getdropbox.com

Vector Art (illustrator) (FREE)
http://garcya.us/blog/category/vector-graphics/

Photography (FREE)
http://freestockphotos.com/FreeGeneral.html

Please feel free to build on this and send it my way.