Mo'plots is a plugin that can work with Towny, and other plot plugins, like PlotMe. This Plugin adds different plot types to Towny, so when you do /plot set [plotname]; you can add different types of plots. Some of the plots are: Road Town Hall, Nation Hall, and many more
What benefit do the plots give aside from a name, cause you can already use /plot set name Road, Town_Hall, Nation_Hall. Plot types requires an idea behind them to be added to towny.