The tiles below are stored in galleries to prevent page elongation. Clicking a gallery will cause it to enlarge, where you can click through the photos at a large resolution. At the top of this is a small link that says something along the lines of "Click to view full size image," which allows you to see the tilesets at their full resolution.
The best way to display tiles can be found here.
Complete tiles that make up the environments, including things such as grass and rock.
World tiles that cycle animations.
These tiles are to create buildings and urban environments.
Props and Assets
Things to be seen in the world such as man made objects.
Gym Exteriors and interiors. Tilesets are only proposed.
These tiles are to be used inside of buildings and houses.
These tiles are meant to be used on the areas outside and on surrounding buildings.
These are tiles that don't quite match any of the other categories, but are still important for the game.
To be sorted into categories once added to a tileset.