Wagtail (our open-source Django CMS [1]) can generate a static HTML export of your site to the filesystem, Amazon S3 or Google App Engine, piggy-backing on the excellent django-medusa library [2]. This feature was commissioned by a security company who didn't want to risk an embarrassing exposure to new vulnerabilities in Drupal, Rails, Django etc.

Search is an issue for static HTML sites. Swiftype [3] and Algolia [4] look like solid options - has anyone used these in production?

[1] https://github.com/torchbox/wagtail

[2] https://github.com/mtigas/django-medusa

[3] https://swiftype.com/

[4] https://www.algolia.com