PathVisio is a free open-source biological pathway analysis software that allows you to draw, edit and analyze biological pathways. Additional features are available as plugins.
Data visualized on pathway in PathVisio.
Advanced features are available via the PathVisio Plug-in Manager.
Identifier mapping options are configurable through the BridgeDerby Config Plugin.
Acute-phase infection response pathway in PathVisio (Tisoncik et al)