The following is a list of active SMF forums which boast a post count of over 500,000.

Name	Description	Posts	Topics	Members	As of (date)
WCRPG		42,250,031	903,152	92,821	5/2/2013
Hogville		6,783,483	316,186	25,572	5/2/2013
Italian Subs Addicted Forum		3,959,424	91,400	312,947	5/1/2013
Simple Machines Community Forum		3,336,714	409,119	315,108	5/1/2013
Chevy Avalanche Fan Club		1,935,658	116,115	49,335	5/2/2013
Marlin Crawler		961,874	65,484	18,548	5/2/2013
Perusing The Shelves		519,311	56565	120,172	5/2/2013