javarebel free license for scala users
from the site:
About a year ago we decided to support the Scala community by providing a free license of JavaRebel to all Scala users. The licenses provided at that time have expired but we want to continue and improve our support.
Instead of a license that expires on a set date – you can now get a license with your name on it that lasts a full year. After that, just re-apply and voila: you’ll have a new key in your inbox.
NB! The JRebel Scala license will only work with .scala files. It will not work for usual Java classes!