If you fancy downloading or uploading to the Steam Workshop, they've put together this big guide. The Workshop Hub in-gameĭevelopers Re-Logic are also curating a selection of their favourites, which include some wee official texture packs from the game's artists plus more golf courses.
Along with reskins of lots of monsters and weapons and new world textures and such, people do use this to tweak the UI with new fonts and styles and things. Texture packs might be more varied than you think, mind.
So you can give things new looks and sounds, play it with new words, or just go see what other people have made. Terraria's Steam Workshop offers worlds, texture packs, music packs, and language packs. Players have been modding the crafty sandbox explore-o-stabber for ages, and the Workshop doesn't support the most complex mods, but a Steam Workshop is certainly welcome for reduced faff. The terrific Terraria added Steam Workshop support in a patch yesterday, making it easier to install mods and share worlds with other players.