Deeplink.me, a service that enables app developers to link directly to content within an application (from anywhere on the Web) has recently announced support for Twitter Cards.
Developers were previously required to maintain a website in order to host the metatags Twitter required for deep linking. That's no longer the case thanks to Deeplink.me, which is now hosting all the metatags and markup for developers using its services - and they're doing it for free.
To use the service, developers simply set up a URL scheme, define some translation rules, and then route incoming URLs through Deeplink.me. Once integrated, the Deeplink.me links can be used in email campaigns, tweets, and Facebook posts and once clicked will direct users to the exact, specified point within the application.