
Narwhal is a free WordPress plugin I maintain which adds a minimal front end new post box. You may configure it within WordPress' Writing settings. I use the term microblogging loosely because it does not include a character limit like many microblogging services. But, you can very quickly post without a title. The fact that a title is not required and it is quick and convenient on the front side of your blog is why I use the term microblog. If you have some HTML and JavaScript knowledge you can relatively easily add some type of character counter and limit. Also, with a little CSS knowledge you can make it look however you want. The screenshot below is the post form on the Twenty Twenty-One WordPress theme with the default styling. In the settings you can hide certain fields to make it look more like a very basic microblogging post box.
The current version is 2.2.2 and it has been tested up to WordPress 5.6 with PHP 7.3.
Get the plugin
An unsolicited review about the plugin
Screenshot:

#WordPress