Hello! Dmitri, author of MiniKanban and some other apps here. A brief FAQ:
Q: What is it?
A: It's a desktop Windows app that implements a Kanban board. You can think of it as an advanced to-do list.
Q: Why is it better than Trello or any other Kanban software of which there are thousands?
A: Originally it was a an over-weekend pet project for my own needs. I needed a Kanban board for quick short-term projects that can link tasks to files on my PC since I myself is mostly a desktop developer. I found none.
Q: Why is it not free?
A: I am indie software vendor, I make living from selling my software products, so this one is commercial too. Compared to cloud-based services it's moderately fairly priced, with one-time fee of 49USD, and no subscriptions.