3GP Converter
Note: You need PSP firmware v2.0 or above for your PSP to play MPEG4/AVC videos. Otherwise, please choose a target format other than MPEG4/AVC. If you don't want to upgrade from 1.50, you can still watch the video using QuickTime v7.0 on your PC. Have fun :)
Calcium has updated his 3GP Converter to version 0.34
Apex PSP Video Converter - PSP VIDEO SOFTWARE
Apex Free PSP Video Converter is an application to convert videos from your hard drive to a Sony Play Station Portable (PSP) compatible format. It supports AVI , DIVX, MOV, QuickTime, MPEG, VCD, DVD, WMV, ASF, RM, RMVB files as inputs
APPSwitcher PSP 1.0
APPSwitcher is a little VSH plugin that lets you categorize your homebrew for the XMB.
By the press of a button combination you can then switch from category to category which then gets shown to you right on the XMB
AVI to PMP
uNn from PS2Dev has released v0.9.5 of his AVI to PMP conversion tool. AVI to PMP is an application that converts normal AVI and VOB files to PMP format so you can play them at full resolution using the latest PMP mod 2.00. AVI to PMP has many customizable features, and includes many applications to aid in converting files from AVI to PMP format
AviSynth 2.5.7 (22.04.06)
XviD4PSP is an XviD video converter for PSP by Winnydows. It needs AviSynth 2.5.6a (this file) and Framework 2.0 (see download link in the article at QJ.net) to work.
The Xvid4PSP .rar file comes with a Russian readme and an English readme
AVItoPMP
Here's another application that will allow you 1.50 PSP owners to convert your VOB and AVI files (DivX/Xvid) to PMP format so you can play them at full resolution using the PSP media player PMP Mod
AVItoPMP 1.0.2
It has been quite a while since we have featured an update of uNn99's useful app- the AVItoPMP. In case you are in the dark about this app, this is actually a conversion tool that will allow you, lucky PSP gamers, to convert your VOB and AVI files (DivX/Xvid) to PMP format so you can play them at full resolution in your PSP
AVIVO Video Converter 1.12
The Avivo Video Converter supports a variety of converting formats, including Mpeg-4 / H.264 for the PSP. To use, install the software and simply select the video input, then choose the output format from the list, and lastly choose the quality (higher means more memory stick space), and then click convert
CIntro
Piccahoe (aka "????" if your browser supports Japanese text) has released CIntro over at our QJ forums. It is a .PMF file player, so it goes without saying that you should only use .PMF movies. The article at PSPUpdates shows a YouTube demo of it (from Kage no Yami)