Vertex Search is a plug-in designed to help you sort through large amounts of vertices to find particular topological events. I find often when modeling that I want to perform tessellation operations on vertices where a particular number of edges meet this script is designed to help you sort through all your vertices and select the ones you want quickly.

For example if you wanted to select every vertex where three edges meet. You simply select all the vertices in the mesh that you want to sort through and type 3 in the text box then press tab. When you have finished all that you click