Free Conceptboard Alternatives

OpenBoard is a cross-platform (Linux / Windows / macOS) interactive whiteboard application. It is currently maintained by the Education Department (DIP) of the Canton of Geneva in Switzerland.

Scalable, secure, cross-device and enterprise-ready team collaboration tool for distributed teams.

Google Drawings, part of Google Drive, allows users to collaborate creating, sharing, and editing images or drawings. It can be used for creating charts, diagrams, designs, flow-charts, etc.

Meet the freeform digital canvas where ideas, content, and people come together.

Online Brainstorming and Collaboration. Brainstorm, organize, prioritize and act on the best ideas, in the same room or around the world, on a realtime sticky note whiteboard.

Infolio is a Digital Workplace for Team Collaboration that allows you to easily create visual workspaces, add all kinds of content (documents, tasks, notes, web links, data), organize it the way you like, share it and collaborate with your team members.

A browser based real-time environment where your team can work with GitHub issues, sticky notes, images, text, and whiteboarding tools - all in real-time, all in the browser - on all modern devices.

Real-time collaborative retrospectives - choose from a variety of templates or create your own, invite your team and start creating post-its! Metro Retro makes it easy for co-located or distributed teams to run engaging and fun retrospectives!.

DEON is a cross-platform zoomable desktop for Windows with realtime collaboration features over IP Networks and thus, is the new project software. The platform integrates with a rapidly growing number of systems and formats.

Coccinella is a free and open-source cross-platform instant messaging client with a built-in whiteboard for improved collaboration with other people.