Kanbanote gives you a Trello-like kanban view of your notes. Looks like a cool concept. I could see it being useful with some additional functionality and polish.
@surfy Looks like you just create multiple "lists" this creates your columns for the board. At first I thought a list was a board, but after you create one -- then just click the + at the top right to create another "list" which is your next column.
Be careful though, if you drag and drop a note from one list to another it applies the same notebook and tags you used for the other list to this note -- so if your lists are created with different notebooks it will move the note to that notebook and add the new tag. I don't think it removes other tags that aren't part of the list variables.
It looks like it could be pretty interesting for some uses, and like Robleh said there may be a bit more functionality and some polish needed if you were going to use this regularly. I'd probably also want the ability to create multiple boards, if I found it very useful.
Boom