The author of Impromptu is now working on Extempore, which unlike Impromptu, is opensource, and runs on other operating systems other than OS X. https://github

The author of Impromptu is now working on Extempore, which unlike Impromptu, is opensource, and runs on other operating systems other than OS X. https://github.com/digego/extempore https://github.com/digego/extempore