Haystack Search - Haystack helps you make the most of your time, by searching all your files and documents in the cloud in one place. It's been built for privacy from the ground up, so your data isn't stored on a server, just your computer.
Kissflow - Kissflow is a workflow tool & business process workflow management software to automate your workflow process. Rated #1 cloud workflow software in Google Apps Marketplace.
MailJack+ - Send PDFs as postal mail
Process Street - Create beautiful rich process documents in a simple to follow checklist format. Fast, free and incredibly simple to use.
Paperkit - Create and download custom graph, lined, or dot grid paper
Pipefy - Pipefy is a process management software that empowers anyone to create and automate efficient workflows on their own without code.