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Astronomical Calendar
Display various information about the sun and moon, like solar day, lunar day, sunrise and sunset...
Spotter Observation
Firefox add-on that helps you create RDF/OWL for species observations....
Observation Post
Observation Post - Observes system status, posts notifications...
Observation Manager
Free logbook for astronomical observations...
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AstroPlanner
AstroPlanner - One of the best programs for observation planning and logging....
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