Board123.com
Offers free hosting for INVISION Power Board forums. With a forum directory.
ClicDev
Ad-supported and free Invision Board hosting service.
Hosted-Forum.com
Offering free Invision Power Board hosting. Features subdomain, custom stylesheet, and upload support.
iPBfree.com
Free Invision Message Board host offering subdomains on the domains iPBfree.com and xpt.net.
IPS Hosting
Division of Invision Power Services offers community hosting packages particularly designed for hosting virtual communities.