Sorry, just forgot the link:

http://www.pps.jussieu.fr/~li/software/index.html#vprint

Zheng Li <li@pps.jussieu.fr> writes:
> Hi,
>
> In the spirit of "release early, release often", we therefore announce the
> first release of Vprint, a runtime value printer module for OCaml. Be warned,
> the module is extremely experimental at the moment, and the implementation is
> very hasty (I got the main idea yesterday when finalising my GSoc project and
> now it's here). So be ready to encounter stupid errors and even core dump, but
> do remember to send me a message about that so I can improve. Here is the
> introduction from README:

-- 
Zheng Li
http://www.pps.jussieu.fr/~li