MathMagic Pro for InDesign for Mac OS X

MathMagic Plug-in provides
you with the user interface(a
menu and a tool button) which
enables you to create and
edit equations inside the
InDesign document.

Then, it communicates with
the external MathMagic Pro
application seamlessly.

You can make any equations with MathMagic Pro application very fast,
and then send back to InDesign. MathMagic Plug-in allows you to place
equations inside a text box as inline graphics, or floating graphic
objects in EPS format. Once created, all equations are handled by
InDesign just like other EPS graphic objects. But you can still edit
those equations anytime just by double-clicking on it.

MathMagic Plug-in recognizes the baseline of equations automatically
so that all equations match well with the baseline of the text line,
even it allows you to shift the baseline manually as well.