dolphin/boonex social network:
Footprints: "Powered by Dolphin - Free Community Software" or "Powered by Dolphin" or "from BoonEx - Social, Online Dating and Community Software Experts"
"powered by drupal" inurl:blog
Footprint: "Powered By Oxwall" "Join"
I think these are good platforms for creating more blog posts and excellent for adding in gsa to have more diverse platforms.