Thoroughbred Bloodlines
- Provides pedigrees for English and American thoroughbred horses, of pre-1850's vintage, showing their descent from the taproot mares. Lists of English and American taproot mares are included.
- http://www.bloodlines.net/TB/

Thoroughbred Pedigree Query
- An online searchable database of Thoroughbred pedigrees. Also includes up-to-date workout statistics for contenders in the Kentucky Derby, Preakness, and Belmont Stakes.
- http://www.pedigreequery.com/

Pedigree Research and Analysis
- An excellent link to sites which deals in information on thoroughbreds, from bloodstocking to horsemanship. This site is maintained by Rose Sylvia.
- http://www.equineinfo.com/horseracing/pedigree.htm

TesioPower
- Australia's top selling pedigree research package, now available online.
- http://www.tesiopower.com

Horsepower
- Extensive information on Thoroughbred racehorse breeding and genetics, specifically focusing on the importance of the female lines. New Zealand.
- http://homepages.ihug.co.nz/~lcables/

BRIS Net
- An extensive horse racing information service. Includes stallions directory, pedigree research and breeders.
- http://www.bris.net/

Pedigree Matching
- Software exclusively for harness and flat racehorse breeding.
- http://www.pedigreematching.com