HUD Compass
kestral

Optionally place a HUD compass and 24-hour clock on the screen.

Complete and Total Lua-Only Inventory Rewrite
Noodlemire

Creates a completely custom inventory system, which doesn't rely at all on any of the usual UserData objects.

Inventory Icon
Wuzzy

Shows a backpack icon in the HUD, which shows how many slots are available and free in the player inventory and equipped bags (if available).