Not a new mod, but one I only just had a reason to download. My latest character is Hot-Lips, an Argonian with red facial markings that led to her name. I was considering an Argonian version of my Orc Hearthfires for her, so I looked around on the Nexus for ideas, and found
Darkwater Den.It has just about everything I was planning, and a few more features besides. Underwater entrance as well as above-ground one, all the crafting stations (including staff enchanter from DB), and reasonable storage. The pluses, and I'm not sure I'd have included those, are displays for Dragon masks, Paragons, and Claws, and a disenchanter.
Of course, it's ready-made, and not a build-your-own, but it's given me ideas for decor (like the green roots everywhere) and general architecture. And Hot-Lips and Derkeethus like it, so it stays in their game. Since Derkeethus is part of the mini-quest to get the key to the place, its location is appropriate.
I'd considered implementing my joke about Siddgeir selling land at the bottom of Lake Illinata, and putting an entrance down there, with a regular Hearthfires starter home as the entryway on-shore. There's a Nordic ruin submerged off the North shore, with a flat patch near it for the small house. I still might build that.