The “nwcommands” can import networks saved in other file formats. Here is a little video that shows how to import Pajek NET and Ucinet DL files. But you can also import networks saved in GraphML, GML or raw matrices (e. saved in Excel) and raw adjacency lists (see help nwimport). There is also another command that makes a network out of an edgelist that is already in Stata (see help nwfromedge). Have fun importing your networks.