Printer Pro - Print attachments, receipts, documents, web pages from your iPad and iPhone.
ezeep - ezeep provides managed cloud printing solutions for educational institutes and SMB's.
CalPrint - CalPrint uses your existing reminders and calendar entries on your iPad or iPhone (Exchange, iCal and Google Calendars etc.
PrintNode - PrintNode offers cloud printing solutions for web applications.
Air Sharing - Air Sharing lets you bring your documents with you — without bringing your computer.
Breezy - Breezy is a secure cloud printing solution that makes it easy to print from any device to any printer on any network.