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Assign/Share a todo item to/with internal users by mentioning them.
<ol>
<li>Mention internal users when an admin wants to assign a todo item to colleagues by typing <code>@</code> when creating a todo item.</li>
<li>Mentioned users would get notification emails. A mentioned user would get an email with the todo item and the link to the edit page that the todo list is on. </li>
<li>Check your todo items on the dashboard. All your todo items (todos mention you) will be on your dashboard. You can go to the edit page by clicking an item.</li>
<li>
Create a todo list in many post types
These are the compatible post types.
<ol>
<li>Posts</li>
<li>WooCommerce Products/Orders/Coupons</li>
<li>Event calendar events</li>
<li>More to come</li>
</ol>
</li>
</ol>

Admin Todotastic

Admins can assign or share todo items attached to a post, a WooCommerce order, a product, and a coupon by mentioning internal users.

Andre Gagnon

Kyle Van Deusen

Docket WP is a productivity tool that allows you to create, save, and execute your standard operating procedures and simple to-do lists from any WordPress installation. By working through standardized procedures you can maximize your efficiency, develop consistency, improve organization, build repeatable systems, and accomplish more in less time.
Docket WP is commonly used for procedures like; Website Launches, Content Publishing, Monthly Maintenance, Website Auditing, Search Engine Optimization, and much more!
Features include:
<ul>
<li>Create unlimited lists for all of your standard operating procedures or one-off to-do’s.</li>
<li>Fill your lists with the individual steps (tasks) you need to take in order to execute your procedures.</li>
<li>Add notes to each task to provide more detail or link to instructions.</li>
<li>Check off tasks as you work through your processes ensuring you never miss a step.</li>
<li>Access your tasks from a small button in the admin bar, or use the keyboard shortcut.</li>
<li>Create list ‘templates’ and save them to your cloud library so you can reuse them on any WordPress installation.</li>
<li>Jumpstart your processes by importing our prebuilt processes list and use them out of the box, or edit them to make them your own.</li>
</ul>
Make it your own by using or editing prebuilt lists or easily customize to fit your needs. 
Do more in less time by standardizing your procedures maximizes your efficiency. 
Develop consistency by having repeatable processes ensure your work is always done right. 
Improve teamwork with clear directions and instructions for step-by-step execution. . 
Reduce redundancy by creating, saving, and accessing lists from unlimited websites. 
Boost creativity by giving your brain space to focus on creative problem solving.

Docket WP

The Docket WP plugin connects your Docket WP account into any WordPress installation. You will need a Docket WP account in order to use the plugin.

Admin Todotastic vs Docket WP