Harold Fortuin's 1994 Clavette midi controller uses straight alternating rows of switches which can be customized for different tunings by programming and with key overlay sheets.
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Michel Geiss, :fr:Christian Braut and Philippe Monsire built the Semantic Daniélou, a 36-tone (out of 53 just intonation notes listed in the book "Sémantique Musicale" by Alain Daniélou) electronic instrument, on behalf of the author, using staggered square key button keyboards from two Cavagnolo Midy 20 master keyboards, where each parallel row of keys offers a transposition by one comma.
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Bosanquet developed classes for musical tunings used mapping pitches in a coordinate arrangement he called a generalized keyboard, contrasting with Henry Ward Poole's and Colin Brown's keyboards which were based on symmetry of key relationships.