Which child/toddler seats are compatible with the Urban Arrow C15 child seat adapter?

The C15 Child Seat Adaptor is officially been made for the Yepp Mini seat, but is also compatible with a lot of other brands, we know it should be at least compatible with: 

• Melia seat (Needs a separate attachment kit)
• Bunch Toddler seat for cargo bikes (also with attachment kit)
• Yepp Mini