While it is not as universally recognized and regarded as the All-Pro lists published by the Associated Press, there are other outlets who similarly post an All-Pro list every season for the NFL, arguably the most prestigious of those secondary venues being that produced by the PFWA, or the Pro Football Writers of America.
In contrast to the AP’s list, the PFWA does not elect a second team, so only a ‘starting’ lineup is actually named, making it somewhat more exclusive in that regard. But they also select all-conference teams for both the NFC and the AFC, which essentially functions as a second-team unit.