Biological networks have several types such as Protein Protein Interaction networks, Molecular Interaction Networks, Regulatory Networks etc. Then after 2000 with the increase in both network numbers and sizes, the new society emerged whom have concentrated on these networks especially originated from graph visualization and drawing researchers.
One of the main tool is Cytoscape. It is well supported and widely used. There are some other tools among them we also provide a tool for the visualization of biclusters and protein-protein interaction networks which is called robinviz.
The sample ppi graph using Cytoscape can be found here.