An interesting question. I am not sure if there is one great source for
that. You can get some idea of open source platforms from FOSS4Lib. I think
Wikipedia actually has a listing of software, but not 100% sure on that. It
is slightly more institutional repository focused, but the Directory of
Open Access Repositories has an interesting statistics section, which I
think includes a chart of what software is used in each repository. I can't
speak to your Greenstone question, I'm not aware of many that use it, but
there could still be a strong user group out there.  Hope that helps a
little.

Matt Sherman
On May 8, 2015 10:24 AM, "Cooper, Krystal" <[log in to unmask]> wrote:

> Does anyone know of a list or website that lists what digital library or
> digital collection software in use at libraries and museums?
>
> I'm curious to know what is most popular or heavily used? Open source vs
> paid.
>
> Is Greenstone still heavily used or is it being phased out?
>
> KC
>