What is "skytools"

SkyTools is an observation-planning program for amateur astronomers, running under Windows.

Unlike most astronomy software, SkyTools is not a planetarium but instead is centred on a database of stars, deep sky objects, asteroids, and comets. The software allows users to create and manage observing lists by searching the database, displaying charts for desired objects, and printing star hopping charts.

The software is developed by Greg Crinklaw and sold by his company, Skyhound.