Invite – The unofficial WordPress Plugin Directory

OpenInviter for WordPress

Allow your visitors to invite their contacts from Yahoo!, GMail, AOL, Hotmail and other providers to your blog.

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

Tsu widget to share your profile / invitation with your readers.

Create memorable Discord invite links (yoursite.com/discord) with tracking, webhooks, and social previews.

Makes BuddyPress's invitation features more powerful.