Fiery Feeds allows you to add custom URL schemes to share articles to other apps since version 1.3. When you go to Settings > Sharing > URL Actions you’ll get a list of a predefined apps that support URL actions, but because I can’t add every app, you can also define your own by hitting the add button and define your own action.

The protocol is used the check if a url of this sort could even be opened (if the requested app is installed); the actions is not displayed in the sharing sheet if this check fails.

You can also define your own email templates, including recipients. You could for example create a email template for OmniFocus’ Mail Drop.