Here is a quick list of Vendors for Customer Relationship Management (CRM) & Content Management System (CMS) that Academic Advisors may use in their practice.  Please continue to add & contribute to the list if you are a writer or add to the comments section:

AdvisorTrac

http://www.advisortrac.net/

Angel Learning

http://www.angellearning.com/

Aleks

http://www.aleks.com/highered

Azorus

http://www.azorus.com/

Clockwork Database Scheduler

http://www.tpro.ca/

DegreeWorks

http://www.sungardhe.com/products/degreeworks

Deisre2Learn

http://www.desire2learn.com/

Hobsons

http://www.hobsons.com/

Intrafinity

http://www.intrafinity.com/

RightNow

http://www.rightnow.com/

Articles (from George's Wiki)

Six steps from customer service, by Susan and Derek Nash - More of a business focus, still addresses key critical issues about implementing a CRM in any organization.

CRM Comparison: How to Evaluate Competing Customer Relationship Management Software, by Joe Taylor Jr. - Addresses nine key considerations: Connectivity, Compatibility, Out-of-the-Box Readiness, Customizability, Ease of Use, Support, Security, Reliability, and Scalability

Academic Analytics, Campbell, DeBlois, Oblinger. An application of CRM to academics that depends on administrative support for data and evidence based decision making. Has case studies.