Great work by Frederici Viticci on chaining apps in IOS.

This workflow is meant for users of Safari for iPad, Drafts, and Due. It will excute the following actions:

Take selected text from Safari for iPad;
Pass it to Drafts alongside the URL it was taken from;
Drafts will upload the text to Dropbox, and send the URL to Due as a reminder;
Once added as a reminder, Due will let you go back to Safari.