Separate Money for Multiplayer is a mod that is a complete overhaul of the way multiplayer works in Separate Play. The most significant changes are:

The way the server and client connect. Separate Money for Multiplayer no longer has a server-side component. All connections are made through the client and there is no longer a server-side component. The way items and money work. All items in the game are no longer tied to a specific player. Players can now buy items without having to find a merchant, and the amount of money they receive is no longer limited by the amount of money their character has. The way the GUI and the game world are separated. The GUI can now be accessed from any player, regardless of who is hosting.