There definitely are several. Firstly, the Squeezelite under Max2Play is also DLNA compatible. Thus you can find it and play to it with apps like bubbleUPNP or with any software that supports DLNA. Secondly, there’s shairtunes2 which makes your Squeezelites also AirPlay compatible and show up as AirPlay devices as well.
Thirdly, there is our Bluetooth plugin and its implementation in the LMS. For more info on that, check our BT plugin and its discussion here: