Sometimes we get questions on identifying different varieties of a plant-this can be a great challenge!  Below is a growing list of websites & information that can help.

Fruit Cultivar Identification websites

Tree Fruits

Apple ID:  Applename.com

Cherry ID: Dave Wilson Nursery page on cherry varieties has about 20 cultivars pictured with short descriptions on each.

Small Fruits

Grape ID:

Iowa University Extension Viticulture website has a nice listing of common grape cultivars for cool climates and includes color pictures of  grape bunches.  Navigate varieties via the column on the left-hand side of the page.
National Grape Registry based out of UC-Davis has the exhaustive list of known grape varieties. Does not contain photographs.