Baubles is a mod created by Azanor. Although he created it for use in Thaumcraft, it is an independant API that other mod authors can plug into to utilize Bauble functionality in their own mods. The Baubles mod itself contains no actual content, and the Bauble content contained within Thaumcraft uses the Bauble API just like any other mod would.
Baubles introduces 4 slot icons into the players inventory; two ring slots, one belt, and one necklace. This mod is compatible with other mods that add slots to a player’s inventory such as Tinker’s Construct.