Fork me, I'm famous!
The modbus library finds its way into the official repositories Fedora (packaged by Stéphane Raimbault), Debian and Ubuntu (packaged by Ivo De Decker).
Of course, we’ll happy to support other distributions!
To improve the communication and ease the subscription process, the libmodbus project as moved from Launchpad list to Google Groups firstname.lastname@example.org.
Update: Julien Boibessot integrated libmodbus into Buildroot.