Trash Swag is a site using the Ushahidi platform which allows users to locate useful trash around the city. The tool works by having users upload information about what find left around on the streets, including pictures and descriptions. Users can get updates, search and notify the administrators of whether the item is still available through their smartphones. the whole application is based on a web map that visualizes the locations of the items. As can be seen in the map, most of the reports are around Bloor Street, around Mirvish Village.
The app is available through the iTunes Store. Looks promising!