I use Kanbanote. It's kind of klunky (ie - you can't be in the note in the Evernote app and also drag the note in the Kanbanote app) but it works - I have 5 boards and what's in the column(s) is a combination of notes and tags and/or just tags.
Because I like the kanban visual/flow I rarely use Tasks. I was looking at the new Tasks full-screen appearance, but it's still not a workflow landscape of what's in the hopper or up-next for me - if that makes sense.
One board is a snapshot of GTD dashboard of items - I start my day looking/updating that. I also have a Tasks & Calls board - similar to what Boot17 discussed - but Kanbanote populates just by adding tags and I think that's the thing. Some columns have disparate notes and kanban lets you see that; a task and a project in a "do now/keep an eye on". Some notes are on multiple boards because the note is a project.