- Docutek VRLplus - Product information and free trial.
- eLibrarian - Product information and support, from Digi-Net Technologies.
- QuestionPoint - Subscription-based collaborative reference service developed by the Library of Congress and OCLC.
- Virtual Reference Toolkit - Product information and demonstration from Library Systems and Services. Also includes links to customer libraries.
Media publications
- Live, Digital Reference Marketplace - Library Journal article by Buff Hirko reviewing products and companies. (Published 2002.10.15)