Update: 3.71 M33 compatible version now available!

You may recall Durka Durka Mahn’s Star Wars Battlefront: Renegade Squadron Cheat Device. This time he’s released a cheat device for Mega Man: Maverick Hunter X.
Version 1 Info:

FlyMode - Allows you to easily fly around the level as X or Vile.
Infinite Health: You will never die! (Unless you […]

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 […]

Zx-81 has released a new version of an emulator from which he got his username from, PSPZX81, the Sinclair ZX-81 emulator for PSP.
Changes:

IR keyboard support !
Now compatible with custom firmwares 3.x and PSP-slim
New graphics
Display and save thumbnail images for each save state
New render mode (fit height and fit) using GPU
New psp clock option (it can […]

Cpasjuste was quick to release CFE 1.9.1, then 1.9.2 right after.
1.9.2

Fixed a stupid bug with nethost in cfe_vsh that was causing to always connect to the computer ip address “192.168.1.2″.

1.9.1

Fixed a bug with usbhost iso streaming while using normal mode.
An option is added to the “cfe.config” configuration file to enable or disable text transparency.

Cpasjuste […]

Still looking for something to convert your videos to make them playable on a PSP? Winnydows’s XviD4PSP video converter is what you need.
Convert videos for PSP, PS3, Xbox 360, iPod, iPhone, BlackBerry, Hardware DVD, and PC supporting a wide range of formats for both import and export.
5.025 Changes:

5.0 version compatible with 64-bit systems now.
Added 71 […]

You heard about it, and now it’s here! Dark_AleX has released custom firmware 3.71 M33 update #3 (M33-3) along with a new PopsLoader.
3.71 M33-3 Changes:

Fixed a bug in access to flash by usb.
HEN core: kernel prx’s with syscall exports work again.
PSP Slim: programmers can set the size of user memory to 52 MB by using […]

Dark_AleX may be done, but custom firmware is not! By reverse engineering Dark_AleX/Team M33’s custom firmware, _HellDashX_ was able to come up with his own — custom firmware 3.72 HX.
This new custom firmware will work on both the Fat PSP and the Slim PSP. The recovery menu is still the same, but _HellDashX_ will update […]

TTYman has announced the release of PSP MAME4ALL v4.9r1 Hires — the Multiple Arcade Machine Emulator (MAME).
Changes:

Crash when sampled used.
Unified builds, thanks to new Z80 core, Mame 0.53 based, compatible with system16, neogeo and classic roms.
Implemented PSP-2000 (slim) specific support, so double memory available to load roms, thanks to keiich-san code.

Make sure you check out […]

If you can’t get enough Doom, you’re in luck because Chilly Willy was quick to release version 1.3 of Doom for the PSP.
This new version allows online play, not only against players with a PSP, but ones with the PC, Mac, or Amiga version, too! The GUI for network games has also been revamped making […]