DigitalME

This plugin adds a simple WordPress button linking to your Discord server. 
You can set your Discord invite URL once in the Settings page, and use the shortcode anywhere in posts, pages, or blocks.
Features: 
* Shortcode [digitalme_discord_button] to place the button anywhere 
* Global settings page for Discord URL under Settings → Discord Button 
* Fixed text (“Join our Discord!”) and styling 
* Lightweight and fully WP.org compliant

DigitalME Join Button for Discord

A simple shortcode and settings page to display a fixed 'Join our Discord!' button.

Tyrel Kelsey

Automatically invite users that have filled out a specified form to your Slack team instead of having to manually invite them yourself.

Formidable to Slack

Allows site owners to automatically send Slack invites to anyone that fills out a specified form.

DigitalME Join Button for Discord vs Formidable to Slack