Night-vision goggles

Night-vision goggles are a piece of cut headwear in Fallout 3, Fallout: New Vegas and Fallout Tactics and were to appear in Van Buren and Fallout: Brotherhood of Steel 2.

Van Buren
General Colridge, Captain Davidson, Captain Pierce and Major Briggs all carry night-vision goggles.

Fallout 3
Meshes and an inventory icon for night-vision goggles appear in Fallout 3's resource files but are unused. The goggles were meant to go along with the merc veteran outfit and have different models for male and female heads.

The Peepers are another pair of night-vision goggles which were cut from Operation: Anchorage.

Fallout: New Vegas
The graphical assets from Fallout 3 for the night vision goggles do not remain in the Fallout: New Vegas art files (except the inventory icon). However, the model folder contains .egm files (used in Gamebryo engine games to modify equipment placement, i.e., on male and female-shaped heads) which were not present in Fallout 3 data. Some night vision functionality can be seen in the varmint rifle night scope and Dead Money's Ghost Sight. Also in the hazmat darklight cowl from Old World Blues.

Fallout Tactics
Night-vision goggles were set to appear in Fallout Tactics, but were cut from the final release.

Fallout: Brotherhood of Steel 2
Wearing night-vision goggles creates a green filter over the screen and enemies will glow allowing the user to see them after sun down or in poorly lit areas.