Our website provides a free download of GraphDark 2.5. The program's installer is commonly called GraphDark.exe. The following versions: 2.5 and 2.0 were the most frequently downloaded ones by the program users. The program is included in Education Tools. This free software is a product of Richard Fleet.
From the developer:
GraphDark can calculate the time when an astronomical object will be visible from your location and whether moonlight, twilight, or low haze will affect the view. The visibility of a single object, such as a comet, can be shown over a period of months or years. GraphDark can also list all the objects that are visible on a single night.
You may want to check out more software, such as Panel, Avantage BPM Foundation or Lasergene, which might be similar to GraphDark.