Nintendulator 0.975 beta (2011/02/03) 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 (2011/02/03) Changelog:

Nintendulator's region handling support has been overhauled, and provisional support for the "Dendy" NTSC/PAL hybrid has been added. Additionally, partial widescreen support has been added to fullscreen mode - based on your primary monitor's current resolution, Nintendulator will try to use one of several appropriate fullscreen resolutions to prevent the image from being stretched horizontally, falling back to 640x480 if none of them work.

Download: Nintendulator 0.975 beta (2011/02/03)
Source: Here