Guitoro is a free browser guitar using recordings of real instruments. You can strum with your keyboard, mouse, or touchscreen, choose acoustic, classical, electric guitar or bass, and see chord fingering and each stroke. Song practice can be slowed to 20%, and there are free chord tools and tuners. No signup or download. 1 minute video demo: https://youtu.be/DtcluMLdSgs I would love feedback on how the strumming feels and sounds.

spotted on Hacker News