Infrastructure diagrams do not have to look like a ransom note of boxes and arrows: FossFLOW draws your network as a clean isometric map in the browser. Drag servers, routers, databases, and cloud services from the component library onto the angled grid, then link them with connectors that snap between nodes in click or drag mode. Multiplexed connectors bundle parallel links into tidy runs, rectangles and freehand annotations mark zones and notes, and text labels explain the flow. A diagram of a messy production network becomes a picture a new hire can read in one sitting. Work saves automatically every few seconds, exports to a JSON file you can keep in version control, and imports back just as easily. Run it as a shared team instance and diagrams persist on the server, filed under the project name, protected by optional basic authentication. The editor also installs as an offline-capable progressive web app, so the canvas keeps working on a plane and syncs nothing anywhere you did not send it. Documentation authors use the exported views in architecture guides, and engineers sketch proposals before touching real hardware. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.