File browser API

I realize this is probably way out of scope for you, but I've been trying to find a module that would provide a file browser for other modules through an API. I'm imagining the ability to click the "Browse" button in the node/add form of the module I'm currently developing, and have the Filebrowser module provide a popup file browser. Clicking on the desired file in the Filebrowser popup would drop the name and path of the file into my module's textfield, and the Filebrowser popup would close. Like I said, it's probably way out of scope.