Snap! C++
Fast Websites: Powerful CMS for Apache written in C++
Snap! C++ runs your CMS using binary code written in C and C++. (We use some libraries that are written in C, all of our server code is written in C++.)
The basic concept is taken from a large set of Drupal 6.x modules from Drupal Core and necessary 3rd party modules (we've been using over 220 modules on top of the Core modules.) The result is quite extensible as it offers a plug-in mechanism that everyone is welcome to use to create their own extensions.
Debian Packages can be downloaded...