I'll start this with a tool inspite of the title named after agile, a practice that cold shoulders it.
Sometimes, the tools that you desire are not available for customization and all the relevance of a given tool seems unrealistic. However, there are alternatives and when they are available, it becomes a pleasure to share.
Restyaboard is one such trello like tool which is opensource and you can setup and customize to your heart's content.
These days, as I am busy in an agile project (that is unfortunately not followed in an agile fashion), doing other things increasingly becomes difficult and same goes for my blogging also.
But one must not give up on good things in life and keep trying and exploring.