ZenHub - ZenHub is how the world's best software teams work together. Trusted by NASA, Docker, and Rackspace. Start free today!
Nullboard - Minimalist locally-stored kanban board / task list manager.
YouTrack - Free, online, easy-to-use, fully customizable issue tracking and agile project management tool your development team will love, by JetBrains. Our cloud or your server.
Waffle - Split screen picture conversations with friends
Atlassian JIRA - Atlassian JIRA is a project management and tracking software for the business users, developers, programmers, etc.
Brisqi - Offline-first personal Kanban app