NASA Space Models: Paper NASA space probe models.
Currell Graphics: A graphics site with paper models of various historical models such as V1 rockets and Scaled Composite aircraft.
Japanese Paper model site :Various free paper models. Includes cars and aircraft.
Paper Models : Site that sells various scales of paper models of aircraft.
Fiddler's Green Paper Models:Site that has some free paper models but also sells paper models individually or as a CD with a one year update subscription.
Yamaha Free Paper models: Free paper models from Yamaha. There are some nice motorcycles and stuff.
Yasu Tanaka's Paper Models:Formula One Paper Model Site.