We at Exchange Union are building xud, the software for a decentralized exchange network called OpenDEX. It brings market makers, exchanges and individual traders worldwide onto a single trading network and liquidity pool. OpenDEX solves the major pain point of most exchanges: the lack of organic liquidity. Some OTC-style exchanges already run XUD with a set of tools to use the network's liquidity for hedge-trading their user trades and control exposure of different assets, essentially using OpenDEX's liquidity to offer trades to their users. Examples of such exchanges can be found here.