First to go was maps.yahoo.com (a.k.a. Yahoo Maps) at the end of June. Though maps will live on within Yahoo search and Flickr in some fashion.

Yahoo maps has been around for eight years, and probably did not get the same level of attention that Google or Microsoft managed.

Support for Yahoo Mail on the built-in Mail app on Apple devices running iOS older than Version 5 as of June 15 is also toast.

Yahoo Chief Architect Amotz Maimon said that if you use iOS 4 & earlier, you can continue to use Yahoo Mail on their Safari mobile browser at mail.yahoo.com.

Yahoo Pipes, a tool for building visually-enticing Web apps from feeds, pages and other services, will no longer by supported as of August. 30.

GeoPlanet and PlaceSpotter APIs are being retired. Media funtions which we never new existed such as Yahoo Music in France and Canada, will be axed.

Xobni email app it has acquired, along with the Yahoo toolbar on Chrome and the Yahoo People Search directory has gone the way of the dodo.

All these seem to be reasonably useful functions which most people didn't know about because they were on Yahoo.