kangax/compat-table — pull request #374 by thejameskyle (2014-12-29 00:48:19+00:00)
Title: Sort compilers by most ES6/7 support

It seems like for the most part that each group is sorted by most supported (browsers sub-sorted by version) with the exception of "server-ish". So I moved 6to5 to the first position since it now has the most support for transpilers.