Here is a sampler of some of the search-specific software and services vendors.
ASG Software Solutions
Total Content Integrator (TCI)
Web search across repositories, file systems, databases and applications, including e-mail and SharePoint.
Semantic middleware for organizational search and classification.
Active Intelligence Engine
Integrate information from internal and external sources for Web portals, site search, discovery and data analysis.
"Pan-enterprise" search across company divisions, operating systems, language barriers and file types; FRCP compliant.
SharePoint Monitor provides real-time, graphical topology of the Microsoft SharePoint environment.
Extend the search capabilities of SharePoint Server and Microsoft Search Server.
Structured and unstructured data including e-mails, attachments, OCR’d images and PDFs.
Taxonomy and automatic document classification using "compound term processing."
Latent semantic indexing—search intelligence from the documents being indexed.
Coveo Enterprise Search
Access to e-mail, archives, CRM, support systems, intranet, enterprise systems, databases, Web and multimedia.
HTML content, documents and digital assets.