About.com: Ground Covers, Plants, Cover Crops
   Site deals with ground cover and the related subjects of cover crops and companion planting. Learn about ground covers to use for specific problem areas, and their care.
   http://landscaping.about.com/od/groundcovervines1/Ground_Covers_Groundcover_Vine_Landscape_Plants.htm

Diseases of Ground Cover Plants
   Fact sheet from Ohio State University on diseases and control measures.
   http://ohioline.osu.edu/hyg-fact/3000/3064.html

Ground Cover Plants
   Article on ground cover usage, advantages, and disadvantages. Includes a checklist of types of plants.
   http://www.pfaf.org/leaflets/grdcover.php

Ground Covers
   Introduction to choosing and planting. Focus is on the Southeast US and includes a zone map.
   http://pubs.caes.uga.edu/caespubs/pubcd/L121.htm

University of Nevada, Reno - Ground Covers
   Features a list with tips on which plants to use, planting instructions, information on grooming and neglect, and maintenance of established plants.
   http://www.unce.unr.edu/publications/files/ho/other/sp9912.pdf