The Jesus Army - Includes a copy of the ODP directory, powered by phpODP, with thumbnail images of web pages from Thumbshots. - http://www.jesus.org.uk/
Jdgo - Search tool, directory from the ODP and news from Big News Network.com. - http://www.jdgo.com/
JasmineCorp Directory - Directory using ODP data with added advertising. - http://jcsearch.com/
Jollyroger.com - Forums and chat rooms for classic books and their authors. Includes a directory using live data from the ODP. - http://jollyroger.com
Jabble - Directory from ODP via twirly.com. - http://www.jabble.com/