Before revision:  c.) to identify key nodes of high community centrality, modular overlap or bridgeness in protein structure, protein-protein interaction and metabolic networks. Availability and implementation: The ModuLand Cytoscape plug-in was written in C++, has a  JAVA-based graphical interface  , can be installed as a single plug-in and can run on Windows, Linux, or Mac OS.
After revision:  c.) module cores predicting the function of the whole module; and d.) key nodes bridging two or multiple modules in complex networks. The plug-in was written in C++, has a JAVA-based graphical interface , can be installed as a single plug-in and can run on Windows, Linux, or Mac OS.