I've got some spare time to work on lyMediaManagerPlugin. I've added a 'folder list' and slightly improved the layout of the 'asset list'. Now you can use two different sortable lists (media and folders) to display and search your media library contents or navigate the folder tree with the media browser (unchanged).

Asset list

Folder list

Media browser

I've released version 0.6.1 that includes all these changes. If you upgrade from an older version you will need to update plugin configuration and add a new thumbnail type named mini (see README). Then run generate-thumbs task or regenerate thumbnails with the batch action in backend.

The new thumbnail type will be displayed in 'asset list' as I thought that the thumbnail size used in media browser was too big for the list view.