DanCoulter

Forgot the Category stops you from forgetting to set a category for a post. It simply pops up a Javascript alert box if 
you haven’t selected any categories when you save a post. That’s all there is to it.

Forgot the Category

Hate forgetting to select a category when you write a new post? I know I do.  This plugin won't let you.

scribu

On the post editing screen, after saving a post, you will notice that the checked categories are displayed on top, breaking the category hierarchy. This plugin removes that “feature”.
Additionally, it automatically scrolls to the first checked category.
Works with custom taxonomies too.
Links: <a href="http://scribu.net/wordpress/category-checklist-tree" rel="nofollow ugc">Plugin News</a> | <a href="http://scribu.net" rel="nofollow ugc">Author’s Site</a>

Category Checklist Tree

Simple and without configuration, it's just does what it says it does.



Works as expected

Really, I just can't understand why WordPress developers walk another way - this is, how it should be! :)
I have launched over 100 websites on WordPress - and they all have this plugin.
Thanks again!

Thanks!

Preserves the category hierarchy on the post editing screen

Forgot the Category vs Category Checklist Tree