IcePanel facilitates collaborative architectural modeling and diagramming using the C4 model, which allows technical and business stakeholders to zoom in to the level of technical detail they need. It supports modeling architecture objects whose metadata and connections can be reused across diagrams, along with the visualization of flows between those objects. Versioning and tagging allows collaborators to model different architecture states (e.g., as-is versus to-be) and track user-defined classifications of various parts of the architecture. We’re keeping an eye on IcePanel for its potential to improve architecture collaboration, particularly for organizations with complex architectures. For an alternative that better supports diagrams as code, check out Structurizr.