Nintendulator 0.975 beta (2011/01/18) is released. Nintendulator is an open source Win32 NES emulator written in C (plus some assembly optimization). The original goal was to emulate the NES down to its hardware quirks; though it's fallen behind over the years, recent builds have caught up once again and can emulate certain behaviors most other emulators neglect to handle. However, this emulation precision comes at a price - a 1500MHz (estimated) or faster CPU is required to emulate at full speed.

Supported file formats include .NES, UNIF, FDS (fwNES format), and NSF. Mappers are handled using external DLLs, complete with extra sound channels for most games which provide them. Other notable features include writing to FDS images (by storing the differences in the SRAM folder), Game Genie support (limited to 3 codes), customizeable controllers (including 4 player), input movie recording and playback (with re-recording), AVI capturing, and a debugger.

Nintendulator 0.975 beta (2011/01/18) Changelog:

As it turns out, my code changes from October 29, 2010 violated relevant guidelines - the appropriate place to store data is indeed within Application Data. This change has thus been reverted, and any data in My Documents will automatically be moved back to Application Data when Nintendulator is opened. In order to properly accomodate for the difficulty of actually locating the savestate folder, a new menu option "Browse Save Files" has been added to the File menu which will open an Explorer window to the appropriate path; similarly, if any files could not be migrated to the Application Data folder, Explorer will browse to the old location to simplify cleanup.

Download: Nintendulator 0.975 beta (2011/01/18)
Source: Here