Enterprise content management (ECM) is a tricky category. Many search and Web content vendors feel they provide "ECM." But, in fact, many solution providers have components and strategies that vary greatly. Here's a sampling of the key players in the ECM market.

Alfresco
Enterprise 3.3
Open source document, Web and records management.

ASG Software
ASG-ViewDirect Suite;
ASG-Cypress Suite
Integrated structured and unstructured content management.

Autonomy
IDOL
Infrastructure for content in any file format-text or voice-based, structured or unstructured.

AvePoint
DocAve
Microsoft SharePoint infrastructure management and protection.

Consona
Consona Knowledge Management 8.0
Support for effective customer service interactions across all channels.

DocuWare
DocuWare 5
Document-based Web and records management.

Ektron
CMS400.Net
Web content development API; social tools included.

EMC
Documentum
Manage, store, secure and deliver unstructured content from a single platform.

Fabasoft
Folio Enterprise
Focus on compliance and information governance.

HP
Content Management Services
Manage the life cycle of content, including digitization, storage, retrieval and distribution.

IBM
FileNet Content Manager
Content federation, collaboration and business content services, DITA and XML authoring.

iDatix
iSynergy
Document management and workflow automation.

IGLOO
IGLOO Software
Emphasis on social network, internal and external.