Apple has killed its Cards app for iPhone and iPad, introduced in 2011 to enable you to create and mail custom greeting cards for a fee. Cards has been removed from the App Store, and if you have it installed, the app will notify you that its associated service is no longer available. If you still want to mail cards, check out Bill Atkinson’s free PhotoCard app, which lets you email cards for free, or send them via postal mail for as little as $1.50. follow link
Mac OS X Services in Snow Leopard
Mac OS X Services let one application supply its powers to another; for example, a Grab service helps TextEdit paste a screenshot into a document. Most users either don't know that Services exist, because they're in an obscure hierarchical menu (ApplicationName > Services), or they mostly don't use them because there are so many of them.
Snow Leopard makes it easier for the uninitiated to utilize this feature; only services appropriate to the current context appear. And in addition to the hierarchical menu, services are discoverable as custom contextual menu items - Control-click in a TextEdit document to access the Grab service, for instance.
In addition, the revamped Keyboard preference pane lets you manage services for the first time ever. You can enable and disable them, and even change their keyboard shortcuts.
- ExtraBITS for 16 September 2013 (16 Sep 13)
Apple Kills Its Cards App