Uglifier minifies JavaScript files by wrapping UglifyJS to be accessible in Ruby

Opal is a Ruby to JavaScript compiler. It is source-to-source, making it fast as a runtime. Opal includes a compiler (which can be run in any browser), a corelib and runtime implementation. The corelib/runtime is also very small.

Terser minifies JavaScript files by wrapping TerserJS to be accessible in Ruby

Starscope is a code indexer, search and navigation tool for Ruby, Golang, and JavaScript. Inspired by the extremely popular Ctags and Cscope utilities, Starscope can answer a lot of questions about a lot of code.

Sprockets support for Opal.

This client library records exceptions in front-end JavaScript code to Squash.

Static website compiler with advanced features, including watcher script.

Ruby runtime and core library for javascript.

Ruby runtime and core library for JavaScript.