Trove mods replace models on your game client with another. Mods are only supported on the PC version.
This list also powers the TroveTools.NET mod loader. You can also find Trove mods on Steam Workshop. To submit your mods to the Trove developers for inclusion into the game, this is the only place to do that.
Mod Packs are lists of mods grouped together, anyone can create one if they are logged in and can be used to help group mods you like, or follow a similar theme.