Taxonomy Tools

ADLIB - Thesaurus Database Server
Attensity Corporation - Relational Extraction Server; Knowledge Engineering Workbench; Quality, Reliability and Durability (QRD) Center; PowerDrill
Ascential Ascential Enterprise Integration Suite
Autonomy Automatic Categorization; Autonomy Channels; Automatic Clustering; Automatic Taxonomy Generation
Bitext Natural language analysis (Spanish and English)
ClearForest ClearResearch; ClearTags
Convera RetrievalWare 8; Classification Workbench
Cuadra STAR/Thesaurus Information Management System
Data Advantage Group DAG MetaCenter 3
Data Harmony Group Information Management Software Tools and Customized Taxonomy Construction Services
Dublin Core Tools
Forth ICS Information Systems Laboratory SIS Thesaurus Management System
Inmagic BiblioTech Thesaurus Builder
empolis ORENGE
Entrieva Content Analytics
Inxight Smart Discovery
Intellisophic
Lingway
Mark Logic Content Interaction Server
MetaMatrix MetaBaseModeler
Mondeca SA Intelligent Topic Manager
MultiTes Desktop Thesaurus Tool
Recommind MindServer Categorization
SER Solutions SERbrainware; SERglobalBrain; SERdistiller; SER eDM
SPSS Predictive Analytics
SPSS/LexiQuest LexiQuest Categorize
Schemalogic Master Metadata - Taxonomy Vocabulary management
Stratify Stratify Discovery System; Classification Server
Synaptica® from Dow Jones - comprehensive, enterprise-class vocabulary and metadata management solutions for maximising information access.
Synercon a.k.a ("also known as") keyword classification for records management
TemaTres PHP/MySQL Thesaurus tool
Teragram
Term Tree 2000
TEMIS SA XTS
Thesaurus Master (Data Harmony)
TheW32 (Tim Craven) also XrefHT32 (Indexer)
tmCAKE Thesaurus management
Trias Politica Thesaurus Builder
Verity Verity K2 Enterprise
WebChoir TermChoir, ViewChoir, LinkChoir, SeekChoir
Wordmap Taxonomy Manager; Server; Classifier

Some other lists of metadata tools:

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