The Magic Box [mirror] by Dennis Lee. Adds a chest to the outskirts of the player camp that will scale multi-tier equipment to a level appropriate for the player character, negating the need to sell gear to a merchant and rebuy it. (I do not consider this to be a cheat, since the Soldier’s Peak Party Storage Chest scales gear for free on consoles.)
Camp Merchant Chest by didymos1120. Adds a storage chest with a merchant-style inventory, near Bodhan’s wagon. I prefer this mod over the ‘Camp Storage Chest’ for several reasons: unlimited capacity, items are sorted by type, and it will sometimes level scale-able weapons and armour.
Another, similar option is the Storage Chest - Store UI by turtlecao. My experience was that the two 'merchant-style' chests do not coexist peacefully… one or the other will either not work at all, or suddenly become inaccessible.
Camp storage chest by Craig Graff. Adds a standard, limited capacity storage chest to the party camp, near the Allied Supply Crates (similar to the Warden’s Keep chest). Does not level equipment, As far as I can recall.
GearRacks [mirror] by ScarabMonkey. Two limited capacity storage containers (a weapon rack and armour stand) placed near Leliana in the party camp. (The mod description indicates that there is also supposed to be a storage chest, but I’ve never seen it. And this mod also does not scale gear.)
Beyond Ferelden Base Chest by jwvanderbeck. Adds a chest similar to the Soldier's Peak chest; does not level equipment from what I can recall.
And finally, a more recent storage mod with equipment levelling capability and multiple containers (!) is MerAnne's Camp Storage by MerAnne.
None of these are compatible out-of-the box with Auto Loot, as that mod will loot the container once and then make it unusable. (Dragonage.ini can be edited to configure the looting mod to exclude the storage chests, however.)