Mikhail Abramov

Magic in the Basement adds a compact floating panel to your site with:
<ul>
<li>A phone link (tel:);</li>
<li>Links to WhatsApp, Telegram, and MAX;</li>
<li>A button to scroll back to the top of the page.</li>
</ul>
Phone number and messenger URLs are set on the plugin settings screen in the WordPress admin. Empty fields are not shown on the front end.
Author: Mikhail Abramov — <a href="https://abramov.top/" rel="nofollow ugc">website</a>, <a href="https://profiles.wordpress.org/abramovtop/" rel="nofollow ugc">WordPress.org profile</a>, e-mail: mikhail@abramov.top

Magic in the Basement

Floating contact bar with phone, WhatsApp, Telegram, MAX links and a back-to-top button.

samwilson

A simple address book plugin.
You can view and edit addresses (names, addresses, phone numbers, email addresses, etc.) in the administration interface (under Manage > Addressbook or as its own top-level menu item), or embed a read-only list of addresses in posts and/or pages.
Addressbook features:
<ul>
<li>Gravatar support for both address lists;</li>
<li>hCard microformat support in the address list.</li>
</ul>
Still to come (hassle me if you want these now):
<ul>
<li>Import/export to a bunch of formats;</li>
<li>Firefox Operator addon scripts to export external addressed into Addressbook;</li>
<li>Pass various options to the <code><addressbook /></code> element, to sort and limit and whatnot;</li>
<li>Templates for the address list display;</li>
<li>Photo upload (probably over-ride the Gravatar, and show a note that there is a Gravatar?);</li>
<li>Custom fields;</li>
</ul>

Addressbook

A simple address book plugin.  View addresses in the admin back-end or embedded in a post or page.

Magic in the Basement vs Addressbook