David Pileggi's site hosting models from several designers - Gary Pilsworth, Diego Cortes Pardo, and others.

Free Total Annihilation paper models.

PaperPino is now a totally free area where you can download paper automata & models without registation.
Simply click-download-print-build &...

free models of airplanes

Model Houses 1/160 (N scale)
This link contains danish houses and a Harbour crane
you can acheive a good result but quite often you´ll
have to design the roof yourself it is not included
the shape of the roof may be there...

New York City Skyscraper Models Scale Models.

Blog posting at Skyscraper City site with everything New York. Buildings are posted as pictures within the posts.

European Space Agency site with several models of significant spacecraft and rockets.

Jet Propulsion Laboratory site with models of several deep space probes and a radio dish from the Deep Space Tracking network.

NASA Discovery educational site with models of several spacecraft for builders of all ages. Very easy to nicely detailed.

The Solar System Exploration website is a one-stop shop for planetary information and models published by NASA's Science Mission Directorate.

Sven Knudsen's link site with lots of spacecraft.

Niels paper models with links to a variety of sites - many spacecraft and other sites of interest.

Free paper crafts, models, origami from an English language, apparently Italian-hosted site. Some cars, busses, and a NYC subway train. Looks like it's just getting started with a forum, downloads, and links as of Feb 2012.

Found by...

KRONO Modelbane

This site has some houses in 1-87 H0 as free downloads.
The business part of this site concerns the making of backgrounds
for model-railroads based on your photos or the standard types shown.

figures,Diromas etc

This is my personal Website.
I collect there everything about taxis of the world.
I constructed a couple of paper-taxis on my own.
Some for my friends and two are more sarcastic ment, because of the trend to mikro-taxis in Germany...

Models of planes, ships, vehicles and other things all in Olli's unique style.

A site with downloadable sci-fi toys made out of cardstock. 1 of the best around , bsg stargate , startrek ,starwars pigs in space

A number of digital models in multiple categories (aircraft, buildings, vehicles, etc).