MDArray-sol, Sol for short, is a front-end platform for desktop application development based on the proprietary (yet free for open source) jxBrowser - https://www.teamdev.com/jxbrowser, a Chromium-based browser. In a sense Sol is similar to Opal in that it allows Ruby developers to code for the browser; however, differently from Opal, Sol does not compile its code to javascript, it implements a DSL that interfaces with javascript through jxBrowser java interface. To the Ruby developer, no javascript is ever required. Also, since there is no compilation there is no need to 'send' data from Ruby to Javascript, data in Ruby, for instance, in a Ruby array or hash, is made available directly to the browser.