moiseh

Provides nice availability calendar shortcode, making the proccess of booking more intuitive and easier to the end user.
This plugin uses FullCalendar library to renderize the calendar, so it’s have great customizability.
To add the availability calendar, just add the <code>[wbc-calendar]</code> shortcode in your page.
Attention: This plugin is an addon for the official <a href="https://woocommerce.com/products/woocommerce-bookings/" rel="nofollow ugc">WooCommerce Bookings</a> extension. It just provides the frontend calendar view, not booking functionalities nor booking type related products.
<iframe loading="lazy" class="youtube-player" width="640" height="360" src="https://www.youtube.com/embed/C2bk_vgCnuM?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>
Premium version features:
<ul>
<li>Allow to define product-specific colors <a href="https://youtu.be/EVNYlV_1Cbk" rel="nofollow ugc">view demo</a></li>
<li>Allow to add availability calendar as widget using drag and drop</li>
<li>Allow to filter by specified product and categories in plugin settings and shortcode</li>
<li>Open bookings directly in AJAX modal and display tooltip on event mouseover <a href="https://youtu.be/EFUXdYNpZU8" rel="nofollow ugc">view demo</a></li>
<li>Reverse calendar logic to display only taken slots</li>
<li>Perform calendar search using AJAX without page reload <a href="https://youtu.be/XRhR-YzI9UI" rel="nofollow ugc">view demo</a></li>
<li>Support for WooCommerce Booking Accommodations</li>
</ul>

WooCommerce Bookings Calendar

Provides nice availability calendar shortcode, making the proccess of booking more intuitive and easier to the end user.

Automattic

Matt Mullenweg

Peter Westwood

Michael Adams (mdawaffe)

Ryan Boren

Andy Skelton

Barry

vnsavage

WordPress VIP

HyperDB is a very advanced database class that replaces a few of the WordPress built-in database functions. The main differences are: 
* HyperDB can be connect to an arbitrary number of database servers, 
* HyperDB inspects each query to determine the appropriate database.
It supports:
<ul>
<li>Read and write servers (replication)</li>
<li>Configurable priority for reading and writing</li>
<li>Local and remote datacenters</li>
<li>Private and public networks</li>
<li>Different tables on different databases/hosts</li>
<li>Smart post-write master reads</li>
<li>Failover for downed host</li>
<li>Advanced statistics for profiling</li>
<li>WordPress Multisite</li>
</ul>
It is based on the code currently used in production on WordPress.com with many MySQL servers spanning multiple datacenters.

HyperDB

HyperDB is a amazing feature.


	You want to make two websites share a (user) table? OK!
	You want to make a website use two databases so we can create a development workflow to "deploy" content in the same time we persist production data? OK!
	And so on...


Of course is unnecessary to talk about how it can help in scaling... Just perfect.


It's just amazing!

This plugin works very well with AWS RDS and read replica.

Works very well with RDS and read Replica

Maybe this plugin is not so popular because many WordPress users are just not technical users, but I truly glad the plugin is here, and hopefully the WordPress team still always have a time to maintenance this :)

Kudos! 

A hidden gem

HyperDB is an advanced database class that supports replication, failover, load balancing, and partitioning.

WooCommerce Bookings Calendar vs HyperDB