Submersible Power Armor
If you're a fan of the Bioshock series, you'll want to take a look at this excellent Fallout 4 Power Armor modification.
The Submersible Power Armor is inspired by the Big Daddies in Bioshock. It looks great but there's more to it than just looks.
This piece of armor allows you to explore the depths of the Commonwealth's various bodies of water, a boost to movement speed, and an increase to your carrying capacity. There's also a custom headlamp with some nice color choices.
The developer is planning some more updates in the future so keep an eye out for those changes in the weeks ahead.