Paint Job Packer is a lightweight mod making tool for Euro Truck Simulator 2 and American Truck Simulator. It allows you to generate simple paint job mods, with a focus on mods that support multiple vehicles.

Features
-Cross-platform support, with Windows, macOS and Linux versions
-Support for player-owned trailers, including those from DLCs
-Support for trucks using the newer accessory-based paintjob system, like the Scania S and MAN TGX Euro 6
-Support for as many vehicles as you like in a single mod
-Built-in support for >100 truck and trailer mods, full list here
-Support for separate paintjobs for each cabin of a truck, in case a single texture doesn’t work for all of them

Credits:
Carsmaniac