Face Cutter is a handy modeling tool designed for cutting ngon face easily.
It allows you to cut perpendicular lines (or rotated) on selected face, by easily defined snapping points.
Set number of divisions (snapping points), then cut by lines.
Ability to cut through the whole mesh (using blender’s Knife projection API)
Define a cut-line by two points
Rotate a cut-line by angle
Align a cut-line by any nearby edge.
It is a very convenient tool for general modeling task. It provides better functionalities comparing to original blender’s K knife tool. Also, it is similar to Ctrl R in blender, but this tool works on ngons too.