GameMusicGear is a music application that lets you play some of your favorite music formats like MP3, MIDI, MOD, PSF, SPC, GYM and few mores.

http://forums.qj.net/f-psp-development-forum-11/t-release-gamemusicgear-010-112111.html

PSPoste is an email client for PSP by David Cummings, Ben Biron and Sajeeth Cherian. This version adds IR Keyboard support.

http://zx81.zx81.free.fr/serendipity/index.php?/archives/200-PSPoste-Email-Client-for-PSP-Beta-6.1-Full-IR-Keyboard-support.html

Cave Story PSP is an unofficial remake, currently in early stages, but playable up to the first boss.

http://community.livejournal.com/doukutsu/92540.html

Here is a new release of AFKIM (Away From the Keyboard Instant Messenger), the instant messaging application for PSP written by Danzel!

Changes:

– Improve IR keyboard handler, it’s now usable everywhere (menus & window) !

http://zx81.zx81.free.fr/serendipity/index.php?/archives/199-guid.html

PSP-PDA is a set of PDA programs including notepad, music player, image viewer, address book, calendar, calculator, and clock.

Changes:

– Improve IR-keyboard handler !
– Bug fix in theme chooser
(but you need now to restart psp-pda to view the new theme)
– Many bug fix in calendar
– New theme designed by ** Vashts121 **

http://zx81.zx81.free.fr/serendipity/index.php?/archives/198-guid.html

PSPColem is a ColecoVision Emulator for PSP.

Changes:

– Save state files are now saved using gzip compression (with STZ as file extention). It’s much faster to save or load states now. You can use gzip or 7-zip to convert old STA to STZ. STA file format is still supported for loading, so you convert your previous saved files inside the emulator.
– Save state dates are displayed in the emulator window (it’s now easier to identify and to load the right save state slot)
– New graphical functions with new smoother render modes. It uses the PSP GPU for rendering, it does not run faster, but it’s a lot smoother.
– Add a new fullscreen option (render mode max)
– Bug fix in Rom file requester
– Multiple keyboard mapping feature (Thanks to Pou-chan) : You can now toggle between three differents keyboard mapping using L/R Trigger keys

http://zx81.zx81.free.fr/serendipity/index.php?/archives/147-guid.html

ColEm-PSP is a ColecoVision emulator for PlayStation Portable. It’s an initial release.

http://psp.akop.org/colem/

xero is currently working on a remake of Halo for the PSP. The game is still in demo-stage.

http://xtreamlua.com/modules.php?name=Forums&file=viewtopic&t=1583

alatnet has ported his Animated Sprite Class/Library from LUA to C++. Not all functions are ported and some functions may have missing code.

http://forums.qj.net/f-psp-development-forum-11/t-release-animated-sprite-c-ver-10-untested-updated-to-101-111722.html

This homebrew is based on LUA player concept and allows users to run and try their Python script based on PSPython by Fraca7 – not OSlib.

http://forums.qj.net/f-psp-development-forum-11/t-release-pyplayer-01-by-fantasymaster-bigboss-111731.html