Polar Operational Environmental Satellites (POES) prior to the SNPP and JPSS series polar orbiters.
The JPSS satellite series includes five polar orbiting environmental satellites owned and operated in a joint mission between NASA and NOAA. S-NPP, NOAA-20 (JPSS-1), NOAA-21 (JPSS-2) are the first three satellites in operations.
Metop-B and C are a pair of polar orbiting meteorological satellites operated by Europe's Meteorological Satellite Organization (EUMETSAT). The official mission status page and link to data are provided here.