npm Original author(s) Isaac Z. Schlueter Developer(s) Rebecca Turner, Kat Marchán, others Initial release January 12, 2010 (2010-01-12)[1] Stable release 4.2.0 / 26 January 2017 (2017-01-26)[2] Preview release 4.3.0 / 9 February 2017 (2017-02-09)[3] Written in JavaScript License Artistic License 2.0 Website www.npmjs.com