Ian Dunn

The <a href="https://wordpress.org/themes/p2" rel="ugc">P2</a> theme lets you quickly create posts from the front end, but by default it only allows you to tag them. This plugin lets adds a dropdown box to the post form so that you can also assign a category to the post.

P2 New Post Categories

Works nicely even on the "Mercury" child theme for P2 :)

Works!

Adds a dropdown menu of categories to the P2 new post form.

Timi Wahalahti

This plugin allows you to set deadline for posts and list posts with upcoming deadlines via shortcode.
Plugin is intended to be used with <a href="https://p2theme.com/" rel="nofollow ugc">P2 theme</a> or <a href="https://geto2.com/" rel="nofollow ugc">o2 plugin</a>, but can also work without it – only P2/o2 spesific functionality is datepicker field added to frontend post submit area. Datepicker for setting deadline is also available in classic editor and Gutenberg.
Plugin also automatically adds deadline to the end of <code>the_content</code> output if deadline is set. List of posts with upcoming deadlines are cached to transients to reduce amount of databse queries in large scale sites.

Post Deadlines

As old as this plugin it is, it still works just as expected on latest version of WordPress and P2 :)

Works like a charm

Simple plugin to add deadlines for posts and list posts with upcoming deadlines. Can be used as standalone or with P2 or o2.

P2 New Post Categories vs Post Deadlines