GLUEscript:
GLUEscript (Glueing Libraries Using EcmaScript) is the successor of wxJavaScript. GLUEscript uses SpiderMonkey, the JavaScript engine used in FireFox.
JLS: Jls is a general-purpose JavaScript platform.
GLUEscript uses SpiderMonkey, the JavaScript engine used in FireFox.
JSDB: JSDB is JavaScript for databases, a scripting language for data-driven, network-centric programming on Windows, Mac, Linux, and SunOS
SpiderMonkey: SpiderMonkey is Mozilla’s JavaScript and WebAssembly Engine, used in Firefox, Servo and various other projects.
therubyracer: Embed the V8 Javascript interpreter into Ruby.
therubyrhino: Embed the Mozilla Rhino Javascript interpreter into Ruby
Johnson: It embeds the Mozilla SpiderMonkey JavaScript runtime as a C extension
Mustang: V8 JavaScript engine embedded into Ruby's shiny body