Awesome
ringo-sunserver
This is a lightweight JSGI server using the HTTP server available in Sun's (Oracle's) JRE. By adjusting Java's Xmx settings and running in interpreted mode (with JIT turned off), it should be possible to use less than 12MB of RAM per RingoJS process using this server.
To run standalone:
ringo sunserver.js myjsgiwebapp.js
To embed:
require('sunserver').run(exports.app, 8080);