There is also sweet expressions[0].<p>[0]: <a href="https://dwheeler.com/readable/" rel="nofollow">https://dwheeler.com/readable/</a>
The pliant language (<a href="http://www.fullpliant.org/" rel="nofollow">http://www.fullpliant.org/</a>) by Hubert Tonneau has been using indented Lisp for some time.