There are many alternatives to Kanboard as a self-hosted solution if you are looking for a replacement. The best Self-Hosted alternative is Wekan, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Kanboard and many of them are available as a self-hosted solution so hopefully you can find a suitable replacement. Other interesting Self-Hosted alternatives to Kanboard are Redmine (Free, Open Source), Taiga.io (Freemium, Open Source), OpenProject (Freemium, Open Source) and JIRA (Paid).
OpenProject is an open-source project management software with a wide set of features and plugins. It supports project timelines / Gantt charts, issue tracking, wiki, document management, time and cost reporting, code management, Scrum and much more.
A Kanban-inspired app for keeping track of things that need to get done. The goal of TaskBoard is to provide a simple and clean interface to a functional and minimal application for keeping track of tasks. It's not trying to be the next Trello or LeanKit.