Packages with the ntp use flag

net-misc / chrony : NTP client and server programs

  • Support for the Network Time Protocol (NTP)

net-misc / ptpd : Precision Time Protocol daemon

  • Enable NTPD cooperation

sci-geosciences / gpsd : GPS daemon and library for USB/serial GPS devices and GPS/mapping clients

  • Enable net-misc/ntp shared memory interface and PPS kernel support for GPS time