A new beta release of this Nintendo DS emulator for Windows is available.
Here's changelog :

Emu

• Fixed bug in OBJ Bitmap.
  
• Fixed bugs in SaveStates routines.
  
• Fixed bug in BEGIN_VTXS register.
  
• Fixed bug in VRAMCNT_* registers.
  
• Fixed bug in Frames Skip routines.
  
• Add Support for 2D render PlugIn.
  
• Add Console Output for debugger.
  
• Add support for Guitar Hero Grip.
  

• Fixed some bugs in resampling routines.
  
• Fixed bug in SaveStates routines.
  

A new version of this Japanese Playstation emulator for Windows has been released.

Download it here or at the author's webpage.

A new release of this CPS1/2 emulator for Windows is available. Here are the new features;

• Added support for the K007232 sound chip [Barry]
  
• Added support for the K051960 and K052109 gfx chips [Barry]
  
• Rewrote the TMNT driver which is now fully working [Barry]
  
• Added driver for Commando and clones [Barry]
  
• Added ESD16 driver [iq_132]
  
• Added NMG5 driver [iq_132]
  
• Added Tecmo driver [iq_132]
  
• Added SunA16 driver [iq_132]
  
• Added Kangaroo driver to debug builds [iq_132]
  
• Added daimakr2 to the CPS-1 driver [Barry]
  
• Added snowbrod to the Snow Bros. driver [Barry]
  
• Added sound to the Pacman driver and fixed some issues with the default inputs [Barry]
  
• Added support for the YM3562 sound chip [Barry]
  
• Added the YM3526 sound to bestbest in the SunA16 driver [Barry]
  
• Added DAC support to Stratovox [iq_132]
  
• Corrected the refresh rate in the CPS-1 driver [Barry]
  
• Changed the refresh rate in the CPS-3 driver [Barry]
  
• Imported fixes from MAME 0.126u5 for fm.c [Barry]
  
• Reduced DAC volume in fm.c for YM2612 matching MAME 0.127 [Barry]
  
• Marked the fake CHD CPS-3 sets as hacks so they can be filtered out [Barry]
  
• Fixed an issue with cheats in Z80 (ZET) based games [Barry]
  
• Added a feature to auto-download support files [Captain CPS-x]
  
• Merged all the LoadPNG() calls [Captain CPS-X]
  
• Added favourite gamelist support [Captain CPS-X]
  
• Allowed the recent gameslist to cycle games currently in the list [Captain CPS-X]
  
• Fixed issues with mouse events on the game window [Captain CPS-X]
  
• Added zlib/libPNG to FBA source, they are now compiled rather than using pre-compiled libraries [Captain CPS-X]
  
• Some updates to the minGW Win32 header file allowing Win32 API Versions 3.8+ to be used, and also to add support for some new functionality to older versions[Barry, Captain CPS-X]
  
• Added a filter for Konami games [Barry]
  
• Matched all sets to MAME 0.127 [Barry]
  

The Multi-System emulator based on MAME core has been updated to 0.127.

Here is the changelog.
0.127

The Russian Coders behind this DreamCast emulator had released a WIP version.

Download here.

A new version of this MAME derivative focused on gambling arcades has been released.

Get it here or at its official site.

A new GBA emulator for Windows has been released. It's a development of he old shiteGBA.

Download it here or at the author's webpage.

A new release of this SNES emulator for Windows and Linux is available.

Changelog:

• Added video synchronization support at long last [blargg, byuu]
  
• Added audio panel to control volume, latency, frequency and SNES input frequency settings
  
• Added driver panel to select APIs to use for video, audio and input
  
• Added crash handler for driver initialization
  
• Xv and SDL video drivers now work with compositing enabled on Linux/Xorg
  
• Improved ALSA audio driver for Linux
  
• Now using a fixed output frequency, along with a 4-tap hermite resampler
  
• Improved header detection; fixes Batman: Revenge of The Joker and a few fan translations
  
• Frameskip will now randomly choose a frame in each set to display; helps with animations
  
• Locales now support meta-data, which allows for unique translations of the same English input
  

The Neoflash Summer Coding Competition is over, and TehSkeen has made a compilation for all of us.

If you are interested visit them at clicking here.

This Commodore 64 emulator has been updated.

Download it here.

The great DreamCast emulator nullDC has been updated to 1.0.3 and added Naomi support!.

The more important changes are.
- VMU/VMS support added.
* Fog emulation added on nullPVR. (Note: This requires a shader model 2 video card for now)
- Experimental DSP emulation support added on nullAICA.
- Image reader can load real CDs now too.
- Added a (hidden) option to get rid of the console window since some people seem to hate it.
- Various bugs and problems fixed. More stuff became compatible. Less issues on already supported stuff.
- NAOMI version of the emulator.

Download the DreamCast version here.

Download the Naomi version here.

A new release of this Japanese Playstation emulator for Windows is available.

Download it here or at the author's webpage.

This PC Engine/Turbo Grafx 16 emulator for Windows has been updated. Here is what's new:

- In "Tengai Makyou - Fuuun Kabuki Den", the problem that ADPCM voice became interrupted occasionally (generated from v1.49, processing that plays ADPCM) was corrected.
- The speed and timing were brought close to a real machine more. In "21emon Mezase Hoteru Ou", the problem that the message window flickered occasionally (generated by a recent version) was solved.
- Additionally, a detailed part has been improved and corrected.

You can download it here or at the author's webpage.

A new version of MAMEUIFX (called before MAME32FX) has been released. You can download it at the author's webpage. Source code also available here.

This unofficial version of MAME has been updated to the latest MAME release.

Here is what's new:
· catlist v0.127 [s_bastian]
· updated Japanese list (jplist0126u5_0818) [mamelist jp]
· [MESS] sync with 0.127 svn r3064 [Sword]
· updated Simplified Chinese list (0127_0820) [kof2112]
· updated Simplified Chinese text [Emuman]
· fixed samuraia sound [JoshuaChang]
· [MAME] sync with 0.127 [Sword]

Download it at the author's webpage. You can download the source code here as well.