What are some alternatives?
When comparing Ruler and LAN Messenger, you can also consider the following products
MailHog - MailHog is an email testing tool inspired by MailCatcher, but easier to install.
BeeBEEP - You can message and share files inside your intranet without a server.
Printix - Printix is a cloud-based print management platform.
Feem - Share files offline. No servers. No cloud. No limits.
PrinterLogic - PrinterLogic is an enterprise print management software.
BORGChat - BORGChat is a LAN messaging software program.