Eric Nieblers Range-v3 library is available:
https://github.com/ericniebler/range-v3/
Its not going to be (much) better in the standard...
Except that it would use real concepts then...
> Check out the (woefully incomplete) documentation here.
and
> No promise is made about support or long-term stability. This code will evolve without regard to backwards compatibility.
That's not to say I blame him, but you really shouldn't be recommending range-v3 for general use.