I abstracted this file manager from another sytem I have been writing, but I think alot of people would find parts of it useful, namely the image editing. It uses a couple open source PHP classes for JSON encoding and image manipulation (using the GD library), and should work on just about any standard PHP 4/5 installation.
Also included are some examples of how to tie the file manager into other applications using a FileChooser and an ImageChooser. I have used these to implement custom TinyMCE file and image choosers.... The code should be pretty extendable (as it was based on some of jacks examples).
These details are provided for information only. No information here is legal advice and should not be used as such.