John

This plugin enables you to manage your projects from the WordPress interface you are already comfortable with. Easily create and track the progress of projects and tasks.

WP-Trac

This plugin allows users to manage projects and tasks.

dimitrov.adrian

scifi Task Manager is simple admin dash only task manager. Purpose of it is to manage and 
organize the work of site that is living in it. The plugin add dashboard widget for easy overview, 
and full list in Dashboard -> Tasks menu. The tasks itself are not public accessible it is 
member (roles can be configured by settings) only information.

scifi Task Manager

scifi Task Manager is simple admin dash only task manager. Purpose of it is to manage and

WP-Trac vs scifi Task Manager