The following is a list of JavaScript engines.
- JavaScriptCore — derived from KJS for Safari
- KJS — for Konqueror
- Narcissus — JavaScript implemented in JavaScript, used on top of SpiderMonkey.
- NGS
- NJS — a successor of NGS
- Rhino — one of several JavaScript engines from Mozilla
- SpiderMonkey — JavaScript engine in Mozilla Gecko applications including Firefox.
- SEE — Simple ECMAScript Engine