Yudhistira Mauris

This plugin helps you create a series of posts. It creates a new taxonomy named ‘series’ (can be modified via filter, see FAQ). There is no setting needed for this plugin. Once it is installed, assign posts you want to group as a series via post editor.
The plugin also creates a posts navigation on posts that belong to a certain series. See screenshots for the examples.

Easy Post Series

Works beautifully and doesn't have a sucking frontend design, as other similar plugins do!

Very good!

silver530

This plugin allows you to make simple to-do lists for task management. The plugin comes with custom post type allowing you to organize your lists by filtering categories. Whether you are planning an adventure, going to shopping or simply keeping track of your daily to-dos. Also comes with a custom widget allowing you to show lists in any widget location or sidebar.

BossList

Task management system inside WordPress admin.

Easy Post Series vs BossList