https://marcosdumay.com

A couple of projects:

https://sealgram.com

A set of email extensions that make it possible to run a PKI over SMTP, making email privacy easy to achieve.

And, besides the extra privacy, the PKI needed shared data and access control, what led me to create a DAV-like system, that lets you share your mailbox over the net, by granting capabilities.

http://marcosdumay.com/rapid-django

A CRUD generator for DJANGO, 'cause I couldn't find any good one.