Exd Pic

Exd Pic is a system for making interactive pictures. It has the most advanced tracing capabilities of products of this type. Publish your interactive pictures as standards-based, mobile-friendly webpages. Embed the published page into your own site.

It offers full versioning and auto-save of the pages you are working on. Once you publish a page to the Web, you can download it onto another computer and continue working on it from there.