KeyFinder is a tool for estimating the musical key of digital recordings, to aid DJs in harmonic mixing. It's primarily developed as Mac software but I try to maintain compatibility with Windows. Some users have reported success in building for Linux. KeyFinder began as my final project submission during an MSc in Computer Science at Birkbeck, University of London. My project report, which documents its algorithms in detail, is available along with a binary download at www.ibrahimshaath.co.uk/keyfinder Localisations are hosted at https://www.transifex.com/projects/p/is_keyfinder/ KeyFinder copyright 2011-2013 Ibrahim Sha'ath