Domain: Phpbb.com
Pagerank: 5
Alexa: 5.837
Domain: Simplemachines.org
Pagerank: 8
Alexa: 6.697
Domain: Phorum.org
Pagerank: 6
Alexa: 73.008
I was searching for the best free forum-system. After reading some artciles on BBs, wanted to compare the best 3 system. The result confused me very much and I can not still decide. How comes that the best one on Alexa has the worst PageRank on Google?