Basslinks
Basslinks.com is the longest running list of maintained bass links on the net. view links, add your bass link, rate another bass site, search for bass sites.
http://www.basslinks.com/
Gollihur Links
Upright double bass instruments, accessories, parts, pickups, amplifiers and more
http://www.gollihur.com/kkbass/basslink.html
Instituteofbass.com
Instituteofbass.com
http://www.instituteofbass.com/links/