Quince
is a stone fruit which ripens fully in the Northeast around Halloween. These pictured still have a while, a little bit too green to pluck, they should be more golden and have no fuzz on their skin. When picked, quince have a fresh and sweet smell, and placed in a basket or plate on the table they last for several days.
A friend gave this tree to my husband the first spring we were together and it it grew quickly. This same friend gave me a cooking lesson with quince; it is a lot of work to make quince jelly and sauce because the fruit is so hard and dense. Almost the consistency of a nut. Quince jelly is particularly tasty, however, and if you have the time and energy, it is worth it.
For a basic quince jelly recipe, go to: http://www.uga.edu/nchfp/how/can_07/quince_jelly.html
More information about Quince, read: http://www.hort.cornell.edu/extension/commercial/fruit/mfruit/quince.html

Indeed, they smell awesome and do last several days