[tekacs]

Yup and the place to look for comparison of them is:

http://kangax.github.io/compat-table/es6/

Though admittedly facts like whether they support source maps (such as Traceur) or preserve comments (not Traceur) are omitted. EJS is impressive though.

[Flenser]

Had to look at the compat-table source to find out that EJS is short for Echo JS

https://github.com/toshok/echo-js

(It's definately this repo: https://github.com/kangax/compat-table/pull/115 )