This Emerson Arcadia 2001 & clones emulator for windows & Amiga OS 3.5+ has seen another update and its changes include:

Another update for this CPS1, CPS2, Neo-Geo, Toaplan, Cave & System 16 arcade emulator with a large System 16 update so lets go in for a closer look:

another update to this Atari ST/TT/Falcon emulator

An Apple 1 emulator for windows

An update from zx81 of this Colecovision emulator for the PSP, and here are the list of changes

Toni Wilen has posted on this thread beta 9 of the WinUAE public beta cycle with these changes:

notaz has updated his Genesis/Sega CD emulator for the GP2X handheld. and here are the list of changes:

MAME32, the MAME port with intregrated frontend has been updated to the latest core release. Download at our MAME page.

Nestopia, quite possibly the best NES emulator for Windows was updated with these changes:

The unofficial variants of MAME were updated to the latest core release. You can get it from our MAME page.

A Japanese Snes emulator for windows, there is an english version available as well. and its changes include:

the best Amiga emulator gets another WIP update, and this is whats coming up:

for those unfamiliar.. yea right. this is high end Amiga desktop environment. and this release includes:

Two emulators from zx81 first we have his MSX emulator for the PSP which has seen these changes:

A bugfix release for this Snes emulator on the Nintendo DS so lets see whats fixed:

This Atari ST/TT/Falcon emulator seems to be undergoing heavy development. i just might have to try it out myself. here are its changes:

DOSBox emulates an Intel x86 PC, complete with sound, graphics, mouse, modem, etc., necessary for running many old DOS
games or applications that simply cannot be run on modern PCs and operating systems. This update has these changes:

Aaron Giles has released the third update to MAME 0.112. The biggest change in this release is a significant change to the way sound is generated.
A side-effect of this change is that it is now very important for the frame rate to be as accurate as possible. This means that the behavior of the code which throttles MAME down to the proper frame rate is very important. Thus, several changes to the way MAME throttles its speed have been implemented/ In addition to the sound changes, Derrick Renaud has made some changes to the way analog inputs are handled. Also, they have some nice additions to the Konami System 573 driver from smf, discrete sound in Amazing Maze thanks again to Derrick, and some nice Eolith driver improvements. A complete list of changes is as follows:

iDeaS is a Nintendo DS emulator for Windows with these changes:

You can get it HERE