POLYSPLIT

PolySplit allows you to split polygon surfaces a la “free-hand”, which means drawing along edges, from points etc. There are additional options like Close Path, which closes the edge path for you; and Quad Autocompletion, which creates additional edges to ensure quad geometry output when you split your geometry. Middle-mouse button scrolling will activate and control the number of divisions that are shown as a guide, and allows you to split an edge in specific amounts (for example, the midpoint of an edge).