The best replacement for nps is npt.

The best alternatives to nps are rated as following:
★★★★★  npt
★★★★  ips
★★★  ppf
★★  dn
★★  npsm
★★  pas
★  nap
★  buttress
★  ias
★  acs
  kies
  ppf which is better
  ulip
  crc
  epf

Your alternative for nps is not listed? Suggest!
Speaking about nps, one probably shouldn't forget about cisco wlc.

Other search terms related to nps and their ratings are:
★★★★★ cisco wlc
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Google Trends

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