Two libraries come to mind. I and others on the Frenetic[0] team have used
both at various points in time to implemented automata-related algorithms.
The first is a project called DPRLE. You can find its home page and my
GitHub clone of the SVN repository below:

  http://www.cs.virginia.edu/~ph4u/dprle/
  https://github.com/seliopou/dprle

The second is a library that I wrote called TDK. It implements a
generalization of BDDs, allowing for variables to have a lattice structure
and terminal nodes to have something like a semi-ring structure. You can
find the GitHub repository here:

  https://github.com/frenetic-lang/ocaml-tdk

Last I checked, TDK is on OPAM, while DPRLE is not. Hope this helps!

-Spiros E.

[0]: http://frenetic-lang.org

On Wed, May 11, 2016 at 2:37 AM, David MENTRE <dmentre@linux-france.org>
wrote:

> Hello,
>
> Le 10/05/2016 23:20, Török Edwin a écrit :
>
>> There is safa/symkat on opam [1].
>>
>
> Yes, I also saw this library. But frankly, it seems overly complicated for
> our needs. I took a look at the API but don't understand it, and I don't
> have time to read the paper and related literature.
>
> Sincerely yours,
> david
>
>
>
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