VOSviewer is a software tool for constructing and visualizing bibliometric networks. These networks may for instance include journals, researchers, or individual publications, and they can be constructed based on co-citation, bibliographic coupling, or co-authorship relations.
SciMAT is an open source (GPLv3) software tool developed to perform a science mapping analysis under a longitudinal framework. SciMAT provides different modules that help the analyst to carry out the steps of a science mapping workflow.