Hojoki makes all your cloud apps work as one.
It sends push notifications and lets you discuss your work as it happens. Works with Google Docs & Drive, Google Calendar, Dropbox, Evernote, Box, Highrise, CloudApp, Delicious, Google Reader, Google Contacts, Basecamp, Twitter, Zendesk, Mendeley, Pivotal Tracker, GitHub, Ta-Da List, Salesforce Chatter, Yammer and Beanstalk.