HardNES
External player for the format, with pictures and information by the creator.

BNSF/MacOS
A NSF player for the Macintosh, based on BNSF for DOS by Fx3.

NSFten
Player for Windows, includes information, downloads and files.

NEZamp
NSF plugin for Winamp that supports many on-cart sound producing devices in Famicom carts.

NSF Collection
Specification, information, players and links relating to the format.