This is the list of various mods for EU3. The Paradox forums have the complete list of all mods for the game and its expansions. This page is for describing and categorising the most popular mods.
Mods with new scripts and no change on map files
Content Extension Mods
Mods with new map and extensive new scripts
Mods concerning textures, artwork and unit appearance
Themed and/or substantial modifications of the original scenario at various levels
Other mods or mixtures of some/all of the other categories