Greasemonkey Port is described as 'Userscript manager for SeaMonkey, originally written by Aaron Boodman and currently SeaMonkey front-end maintained by Marti, Ratty and/or Farby with some backend support from Anthony Lieuallen and Johan Sundström' and is a userscript manager in the web browsers category. There are more than 10 alternatives to Greasemonkey Port for a variety of platforms, including Mozilla Firefox, Mac, Windows, Linux and Google Chrome apps. The best Greasemonkey Port alternative is Greasemonkey, which is both free and Open Source. Other great apps like Greasemonkey Port are Violentmonkey, Tampermonkey, FireMonkey and Man in the Middle.