The popular social publishing platform Drupal can handle community blogs & so much more.
Build a site from scratch, conversions, maintenance & tweaks. It's open source & versatile!
wordpress_migrate which migrates from WordPress to Drupal
headroomjs wrapper module
Contributed some help with drupalmoduleupgrader
Integral Community Exchange System
I also was the lead co-maintainer for the zurb_foundation theme for several years.
See my Drupal.org profile for more info.