I have to admit, I've fallen in love with Trello as a productivity tool. If you like keeping lists as a way to organize your work, it's a very good tool. For me, it serves two primary purposes: keeping a GTD framework, and managing certain projects with a kanban-like schedule.

But Trello is a closed source SaaS product, and I wanted to know whether I could find an open source alternative to meet my needs. As much as I love Trello, it lacks a few features that I'd really like to have in a list/task manager, and I wanted to explore my other options.