Turning chaotic group brainstorming sessions into structured visual diagrams, TeamMapper provides a real-time collaborative mind mapping workspace that teams and classrooms can join instantly without creating user accounts. Workshop facilitators, teachers, and product squads start from a central root topic and branch outward into hierarchical radial trees, using keyboard shortcuts and full undo-redo history to capture ideas at the speed of conversation. Every node can be styled with custom branch and background colors, adjustable font weights and sizes, external reference links, uploaded raster images, and visual pictograms from the ARASAAC library to reinforce memory and visual association. Sharing a live session takes a single click: hosts distribute either a view-only link, a full modification invite URL, or a scannable QR code so remote colleagues and students in the same room can edit branches simultaneously. When enabled by the administrator, an integrated AI assistant can automatically generate initial mind map branches and subtopics from a text prompt to jump-start planning sessions. Completed maps export cleanly to JSON, Mermaid diagram syntax, scalable SVG vectors, high-resolution PNG images, or printable PDF documents, and existing JSON maps can be re-imported at any time for follow-up workshops. Built-in privacy controls automatically purge inactive mind maps and orphaned image attachments after a configurable retention window, simplifying GDPR compliance for schools and enterprises. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. MIT licensed.