This papercraft is a Mine Diorama, created by Pro Fantasy. The papercraft series includes Wagons, Walls and Grounds. You can download these templates here: Mine Diorama Free Papercraft Download
This is a WWII German Battlefield Papercraft Diorama, created by Tinchik, and in 1:50 scale. The paper diorama template contains SdKfz 2 (Kleines Kettenkraftrad HK 101 Kettenkrad), the Springer (complete name: Mittlerer Ladungsträger Springer, Sd.Kfz. 304), 2 cm Flak 30 and Flak 38 anti-aircraft guns.
You can download this paper model template here: WWII German Battlefield Papercraft Diorama Free Template Download [Box] [Gavitex]
Here are Firebase Maginot and Derelict II Mega Set Papercraft Miniatures, created by Ebbles Miniatures. They are perfect for wargames and military dioramas. There are other four similar series on the site: series 1, series 2, series 3 and series 4.
You can download templates here: Firebase Maginot and Derelict II Mega Set Papercraft Miniatures Free Templates Download
This paper model is an Oggam Hut, created by The Grinning Skull. It will be useful in a variety of other gaming situations. You can download this papercraft model template here: Oggam Hut Free Paper Model Download
Here are several very simple Furniture paper models, created by fccafe. They are good models for diorama or paper scene. You can download templates here: Simple Furniture Paper Models for Diorama Free Templates Download