Sleep Home Pages (Popularity: ): Provides sleep and neuroscience information to increase awareness of sleep research and the impact of sleep disorders. Sleep Medicine (Popularity: ): Covers all aspects of sleep including physiology, clinical sleep medicine, sleep research, and patient information. New Abstracts and Papers in Sleep (NAPS) (Popularity: ): Free weekly current alerting service for the sleep field.
Bibliosleep (Popularity: ): Bibliography of sleep and sleep-related papers from 1994 to the present.
Sleep Medicine Northwest (Popularity: ): Clinic and laboratory treating all types of sleep disorders including fatigue, sleepiness, insomnia, apnea, snoring, narcolepsy, and restless leg syndrome.
Journal of Circadian Rhythms (Popularity: ): Publishes papers on all aspects of circadian and nycthemeral (daily) rhythms in living organisms, including processes associated with photoperiodism and daily torpor.
Wikipedia: Circadian Rhythm (Popularity: ): User-edited article about the "internal body clock" that regulates the (roughly) 24-hour cycle of biological processes in animals and plants.
SleepQuest (Popularity: ): Offers information on sleep and disorders such as obstructive sleep apnea as well as links to sleep-related organizations.