Those dying for a new SNES emulator update will be happy to hear that knuckles84 has began working on the project and released an update:
Ok, because there is no complete Ruka source to make a 3xx port, so ChillyWilly had only make a very good port of the original 0.4.2Me version
but he won’t give this […]

It’s the end for PSPSim as Zx-81 has rolled out the final version, 1.1.1, of the SamCoupé emulator for PSP.
For those who haven’t seen previous versions, SimCoupe emulates a SAM Coupe - an 8-bit, Z80-based home computer released in 1989 by Miles Gordon Technology.
Changes:

Speed improvement for all render mode (all render modes use now the […]

Update: Here’s version 1.0.2:

Add save state feature!
Display and save thumbnail images for each save state

Disable speech system (make the emulator to freeze)
Bug fix in the render function (dark screen)

Download from Zx-81

Zx-81 has announced the release of PSPTI99 v1.0.1, a TI-99/4 emulator for PSP.
TI99Sim is a very good emulator of Texas Instruments TI99 home computer running […]

Update: v1.3.2 now available for download!
Changes:

Option to display in green (monochrome)
Option to scroll up or down the screen (when the screen is not properly centered)

Analog pad can now be used in the file requester to move faster through the disk/snapshot lists
Check CPM disk automatically (and run |CPM instead of RUN”)

Bug fix in the disk explorer […]

Zx-81 has rolled out a new version of PSPMSX — the MSX emulator for PSP.
For those who haven’t seen previous versions, fMSX is a famous emulator of the MSX, MSX2, and MSX2+ 8bit home computers. It runs MSX/MSX2/MSX2+ software on many different platforms including Windows and Unix.
Changes:

Major speed improvements while using GU render modes
[…]

Zx-81 has released PSPAtari v1.1.0, the Atari 800, 800XL, 130XE, and 5200 series emulator. This new version is now PSP Slim compatible and adds IR keyboard support (Phat only).
Changelog:

Major speed improvements in smooth rendering!
Compatible with custom firmwares 3.x and PSP-slim
Display and save thumbnail images for each save state
Add a simple intro splash screen
New […]

Enjoy countless hours of Genesis/Sega CD games on your PSP with notaz’s PicoDrive — the Genesis/Sega CD emulator for PSP.
v1.35b Changes:

mp3 code should no longer fail on 1.5 firmware.
added gamma adjustment option.
added .cso ISO format support. Useful for non-FMV games.
it is now possile to force a region after the ROM is loaded.
fixed a sram bug […]

TTYman has released yet another version of PSP MAME4ALL, the Multiple Arcade Machine Emulator (MAME).
Changes:

Usermode builds now works.
Dipswitches settings added.
Some Z80 core speedups.
Vector based games like Asteroids now run at native resolution of 480×272 pixels.
Preliminary memory management to clean-up things in certain romset (due to original MAME bugs) before starting a […]

Zx-81 has released PSPSim v1.1.0 — the SamCoupé Emulator for PSP.
Changes:

IR keyboard support !
Speed improvement
New speed limiter function
Add option to display fps rate
Now compatible with custom firmwares 3.x and PSP-slim
Add a simple intro splash screen
Option to prevent the blue led to be displayed when L or R are pressed
[…]

Update:
The sound was too crappy in [v1.10], so back to previous sound engine with version 1.1.1

After releasing a new version of PSPZX81, Zx-81 has released PSP7800, the Atari 7800 console emulator for PSP.
Changes:

Display and save thumbnail images for each save state
IR keyboard support (mainly for menu)
Add option to display fps rate
Option to prevent the […]