The best replacement for trimble is topcon.

The best alternatives to trimble are rated as following:
★★★★★  topcon
★★★★  garmin
★★★  ag leader
★★  leica
★★  greenstar
★★  google sketchup
★★  sokkia
★  western reserve
★  shadyside
★  marion local
  steubenville catholic
  wahama
  state of indiana

Your alternative for trimble is not listed? Suggest!
Speaking about trimble, one probably shouldn't forget about variable rate.

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



Google Trends

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trimble
topcon
garmin