MetaPlot is a set of MetaPost macros for manipulating pre-generated plots (and similar objects), and formatting them for inclusion in a MetaPost figure. The intent is that the plots can be generated by some outside program, in an abstract manner that does not require making decisions about on-page sizing and layout, and then they can be imported into MetaPlot and arranged using the full capabilities of MetaPost. Metaplot also includes a very flexible set of macros for generating plot axes, which may be useful in other contexts as well.