Numen [1] is an Emacs REPL we wrote for Parenscript + Node.js a few years ago. The version that's up on Github works with a different Lisp called Lumen [2] that compiles to JS and Lua, which we created partly as a Parenscript successor (it's self-hosted) but mostly as an experiment in a table-oriented Lisp [3,4]. But the differences between that REPL and the Parenscript one are trivial, and I can put the PS REPL up if anyone's interested. We still have plenty of code in Parenscript—including a Chrome extension we wrote to support HN moderation—so I use it every day.
1. https://github.com/gruseom/numen
2. https://github.com/sctb/lumen
I do not like react router nor flux. They are way too frameworky for me. As long as you have state moving in one direction managing it is quite simple without any additional frameworks.
I am not a fan of "write javascript in language X", but for code generation (say: generate js-equivalents of existing DAO class definitions in cl) parenscript is a real gem.
