Carelessly Crazy Caldera Community by Team Suran Suran (incl. Gavrilo93): gives the equivalent of the LGNPC treatment to Caldera (which doesn't have its own LGNPC module): adds a new shop, 2 new NPCs, 17 new quests, and adds unique background, personality and dialogue to most of the NPCs of the town.
[...]
Magical Missions by Von Django: this mod adds five new quests for members of the Mages Guild given by Master Wizard Folms Mirel in Caldera. New quests include delivering a coded message, solving a murder, investigating a heist, bartering with the Telvanni and retrieving a tome of dark power for the Master Wizard of Caldera.
Caldera Mages Guild Expanded by Lucevar: this mod is a lore-friendly and balanced expansion of the Caldera Mages Guild, with some quests and new NPCs. Features include four new NPCs with some custom dialogue, one new social-based quest suitable for low level characters, a library with books you can borrow depending on your rank in the Mages Guild and no overpowered loot.
Note: These two mods are compatible with each other as well as with the aforementioned Carelessly Crazy Caldera Community mod.