Unitful.jl has recently undergone a major update with enhanced 
functionality. If the previous version was an alpha release, this is 
something like a beta release before the package is registered and tagged. 
I intend to do that soon so that others can think about using the package 
more seriously, probably shortly after Julia 0.5.0 is released. Now is a 
good time to provide feedback if you find bugs or think there are some 
trouble spots that would prevent the package from being useful to you. 

I am sorry to inconvenience existing users with syntax changes, but please 
raise an issue or post here if you have any trouble. I hope the revised 
documentation explains any questions you may have, and as usual, 
test/runtests.jl can be useful to figure out how things are working. Once 
the package is registered and tagged, I will be more conscientious 
regarding breaking changes.

Enjoy,
Andrew Keller

On Friday, February 12, 2016 at 12:23:22 PM UTC-8, Andrew Keller wrote:
>
> I'm happy to share a package I wrote for using physical units in Julia, 
> Unitful.jl <https://www.github.com/ajkeller34/Unitful.jl>. Much credit 
> and gratitude is due to Keno Fischer for the SIUnits.jl 
> <https://www.github.com/keno/SIUnits.jl> package which served as my 
> inspiration. This is a work in progress, but I think perhaps a serviceable 
> one depending on what you're doing. 
>
> Like SIUnits.jl, this package encodes units in the type signature to avoid 
> run-time performance penalties. From there, the implementations diverge. 
> The package is targeted to Julia 0.5 / master, as there are some 
> limitations with how promote_op is used in Julia 0.4 (#13803) 
> <https://github.com/JuliaLang/julia/pull/13803>. I decided it wasn't 
> worth targeting 0.4 if the behavior would be inconsistent. 
>
> Some highlights include:
>
>    - Non-SI units are treated on the same footing as SI units, with only 
>    a few exceptions (unit conversion method). Use whatever weird units 
>    you want.
>    - Support for units like micron / (meter Kelvin), where some of the 
>    units could cancel out but you don't necessarily want them to.
>    - Support for LinSpace and other Range types. Probably there are still 
>    some glitches to be found, though.
>    - Support for rational exponents of units.
>    - Some tests (see these for usage examples).
>
> Please see the documentation for a comprehensive discussion, including 
> issues / to do list, as well as how to add your own units, etc.
> Comments and feedback are welcome.
>
> Best,
> Andrew Keller
>

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