I'm thinking about a simple yet useful app for managing various files (text/content in my case). You get a folder where you can put files and sub folder which can be browsed from the www view as "categories". Extras would add support for titles, descriptions and searching. More extras would alter displaying of some file types (code files - highlight, *,markdown, *.rest - show as HTML)

The Concept - Hierarchical folder structure - Upload a document to a folder and it will show on the page in folder-category - upload & forget

The Coolness - Each folder would have a shelve or similar db which would contain data like: order of files, alternate titles and descriptions. - Each publication could have its own shelve/anydbm db with settings and basic info (note that the publication ma be a binary file like PDF, ODT, DOC). Set default format (if you upload the same publication in may file formats) etc. [maybe a sqlite db per folder for all this?] - *2HTML support for ODT, ReST, Markdowm... and more like that, *.py file would be highlighted - a source code browser :) - some full text search like with pyndexter (lucene can index non-plaintext files...)

All the configuration and editing on the site would have nice scriptaculous/web helpers look and some drag and drop like this: http://www.dhtmlgoodies.com/scripts/drag-drop-folder-tree/drag-drop-folder-tree.html

Currently I'm gathering ideas and thinking how to make it as simple and as nice as possible :) Any suggestions welcomed.