Printer Pro - Print attachments, receipts, documents, web pages from your iPad and iPhone.
Outlook4Gmail - Outlook4Gmail provides easy synchronization of your Outlook and Google accounts
CalPrint - CalPrint uses your existing reminders and calendar entries on your iPad or iPhone (Exchange, iCal and Google Calendars etc.
Boomerang for Outlook - Boomerang for Outlook offers email productivity tools to track, schedule and send mails at the right time.
Air Sharing - Air Sharing lets you bring your documents with you — without bringing your computer.
BlueMail - BlueMail is an email management app for Android, iOS, and Windows.