What are some alternatives?
When comparing Ruler and Printix, you can also consider the following products
MailHog - MailHog is an email testing tool inspired by MailCatcher, but easier to install.
PrintNode - PrintNode offers cloud printing solutions for web applications.
LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
ezeep - ezeep provides managed cloud printing solutions for educational institutes and SMB's.
PrinterLogic - PrinterLogic is an enterprise print management software.
PDFsam - PDFsam Basic, a free, open source, multi-platform software designed to split, merge, extract pages, mix and rotate PDF files