The ETS2 community is famous for massive, high-quality mods that are free to download once you own the base game. The most famous is , which drastically expands the map to include places like Iceland, northern Scandinavia, and the Middle East. To help you get started, let me know:
It allows you to easily use the Steam Workshop , which has thousands of free mods (new trucks, graphics upgrades, etc.).
Are you interested in (like map expansions or realistic physics)?