The best replacement for nexstar is cpc.

The best alternatives to nexstar are rated as following:
★★★★★  cpc
★★★  skyprodigy
★★★  meade
★★  autostar
★★  etx
★★  nexstar+
★★  synscan
★  astromaster
★  meade etx
  alpha 40
  avistar

Your alternative for nexstar is not listed? Suggest!
Speaking about nexstar, one probably shouldn't forget about stellarium.

Other search terms related to nexstar and their ratings are:
★★★★★ stellarium
You have in mind a companion for nexstar and it is not yet here? Propose!



Google Trends

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nexstar
cpc
skyprodigy