Swiss Neutron monitors and SONTEL [Solar Neutron Telescope Gornergrat]
Mexico City neutron monitor data sets
Moscow neutron monitor (with real-time data!)
Neutron monitor data sets from the University of New Hampshire (formerly at University at Chicago)
Neutron monitor data archive at NOAA (1953 - present)
Oulu Cosmic Ray Station
Neutron monitors of the Potchefstroom University in the southern hemisphere. Link not operational.
Neutron monitor data from Yerevan
Lomnicky Stít neutron monitor (Slovakia)