If you need a simple self-hosted project management plugin for being able to deal with client projects a solid option is to use the WP Project Manager plugin.
After you have installed and activated the plugin on your site it will add a new admin menu;
The first thing you will need to do is create a project once you have created a project you can add tasks, milestones, and even discussions.
One of the free integrations is with Trello. Where you can import projects, task lists, subtasks, and even users into WP Project Manager.
World of WordPress is hosted by:
While others try to add more components to their hosting to make it go faster, we decided to build our hosting cloud fast from the ground up. We did so by stripping out everything we knew was deadweight.