ABC Namebank
Ashton-Adams
BizWord
Brand Fidelity
Catch-Word
Comspring - recently acquired
Connotation - no longer on the web
Future Brand
Hayden Group - no longer on the web
Interbrand
Landor
Lexicon Branding
Naming
Medibrand
Metaphor
Names and Brands
NameIt
NameBase
NameLab
NameTrade
Naming Company
Namix
Nomenon
A Hundred Monkeys
Mark Russell
Wordlab