Impressionist is a WSIWYG (like) tool to create impress.js presentations. This is an early preview and has stability issues. Please do help me fix them by logging the issues you find at impressionist project on github. At the moment, this preview of Impressionist works only with webkit based browsers (Chrome / Safari). Apologize the inconvenience.
A project by Harish Sivaramakrishnan (@hsivaram).