I just want to clarify for the one that flagged this question as duplicate that these questions are NOT the same.
The question "Which belt slot items have useful properties (other than light)?" asks for items with properties.
This question asks for ALL items that are possible to equip, regardless beneficial use such as practical stats, light etc.
Let this one be in peace and please think twice before flagging.
Just because two questions has a related topic does NOT mean that the questions are asking about the same thing.