I have the very same problem with untangling necklaces!! i bought some stands that are a womans body (minus the head) and they are dressed in a variety of clothing from black ball dresses with sequins to seventies classic looks, they have a 'tree' type shape thing coming out of the top ideal for hangingnecklaces, bangles, watches, rings and dangly earrings from! i have three of them and they hardly take up any room and look pretty!
I realise this would be so much more help if i knew a name but i can't find the box they came in! i will search and find it!