TF2Gallery is a website that was created in order to allow players to examine the appearance of hats in-game. It is currently under development.
All of the images that users upload are stored on the site. By browsing the available pages, individuals can find the hat that they are looking for, and examine its appearance in-game. Because the content of the site is user-submitted, the viewer has no control over the content of the image, such as which map or server modifications were used, etc.
TF2Gallery also allows users to login using Steam as an OpenID provider, although individuals are not required to login before browsing and uploading images. If users elect to log in however, they can track the images that they have uploaded.