Sirvelia

Create and set Gutenberg blocks templates for your posts, pages and custom post types.
<ol>
<li>Go to Blocks Templates->Create Template in your admin panel.</li>
<li>Start creating your template, adding any blocks you’d like with the Gutenberg editor.</li>
<li>Assign your newly created template to any post type (post, page or custom).</li>
<li>The template will be set as the default content of new posts of that type.</li>
</ol>
CBT also includes some blocks 😉
<ul>
<li>Private Block: A block that helps you protect your content and control its visibility. You can protect anything inside this “block container” with a password, allow only logged-in members to see the contents, filter by user role and display only in single or archive pages.</li>
<li>Accordion: An accordion-like drop down with a header and InnerBlocks, so you can create multiple accordions inside.</li>
<li>CSV Tables: Allows you to import a CSV file and show its contents in a table with search and order functionality.</li>
<li>Card: A simple bordered box with a header and custom content (Inner Blocks).</li>
<li>Social share: Choose your favorite social media platforms and allow visitors to share your content easily. Supports: Buffer, Diaspora, Douban, Evernote, Facebook, Flipboard, Hacker News, Hatena, Kakao Story, LINE, LinkedIn, Menéame, Mixi, Pinterest, Pocket, Qzone, Reddit, Renren, Telegram, Tumblr, Twitter, VK, Weibo, WhatsApp and Xing</li>
</ul>
And new controls for any blocks with rich text!
<ul>
<li>Font Awesome Icons: Search Font Awesome 5 icons and include it in your posts as inline elements.</li>
<li>Dynamic Text: Display the author name, post title, published date, categories and/or tags anywhere on your posts.</li>
</ul>

Custom Blocks Templates

Create and set Gutenberg blocks templates for posts, pages and custom post types

GhozyLab

This plugin will help you to display vector icon font into post, page or widget easily. There are available more than 2.5k icons that you can choose. You can customize the look like changing color, size, align etc.
<h4>Available Icon Library</h4>
<ul>
<li>Font Awesome ( fontawesome ) : Font Awesome gives you scalable vector icons that can instantly be customized — size, color, drop shadow, and anything that can be done with the power of CSS.</li>
<li>Fontello : This library lets you combine icon webfonts for your own web project.</li>
<li>IcoMoon : IcoMoon is striving to build and provide the best iconography and icon management tool for perfectionists. IcoMoon icon library features only the very best icon sets out there.</li>
<li>Open Iconic : Open Iconic is the open source sibling of Iconic. It is a hyper-legible collection of 223 icons with a tiny footprint—ready to use with Bootstrap.</li>
<li>WordPress Dashicons : Dashicons is the official icon font of the WordPress admin as of 3.8.</li>
<li>Google Material Fonts : Material icons are beautifully crafted, delightful, and easy to use in your web.</li>
<li>JustVector Social Icons : These 150 monochrome social icons are designed with simplicity in mind. Provided in vector format, they are fully editable and scale to any size smoothly.</li>
<li>Payment Fonts : PaymentFont was originally made for WooCommerce Payment Methods Plugin for WordPress and WooCommerce.</li>
</ul>
<h3>Recommended Plugins</h3>
The following are other recommended plugins by the author:
<ul>
<li><a href="https://wordpress.org/plugins/easy-media-gallery/" title="gallery plugin" rel="ugc">Best Gallery Plugin</a> – Easy Media Gallery is a wordpress plugin designed to display various media support including grid gallery, galleries, photo album, multiple photo albums, portfolio, photo gallery or image gallery.</li>
<li><a href="https://wordpress.org/plugins/image-slider-widget/" title="slider plugin" rel="ugc">Best Image Slider Plugin</a> – Easy Image Slider Widget – Displaying your image as slider in widget/sidebar area with very easy. Allows you to customize it to looking exactly what you want.</li>
<li><a href="https://wordpress.org/plugins/contact-form-lite/" title="Contact Form" rel="ugc">Best Contact Form Plugin</a> – The Best Contact Form Plugin to create awesome Contact Form in minutes.</li>
<li><a href="https://wordpress.org/plugins/feed-instagram-lite/" title="Instagram" rel="ugc">Instagram Plugin</a> – Instagram Plugin – Display your Instagram media as masonry gallery in WordPress site with very easily.</li>
<li><a href="https://wordpress.org/plugins/easy-notify-lite/" title="optin form plugin" rel="ugc">Best Popup Plugin</a> – The Best Notify and Subscription Form Plugin to display notify popup, announcement and subscribe form with very ease, fancy and elegant.</li>
<li><a href="https://wordpress.org/plugins/image-carousel/" title="image carousel" rel="ugc">Best Image Carousel</a> – Touch enabled WordPress plugin that lets you create a beautiful responsive image carousel.</li>
<li><a href="https://wordpress.org/plugins/gallery-lightbox-slider/" title="Gallery Lightbox" rel="ugc">Best Gallery Lightbox</a> – Gallery Lightbox – Displays all gallery images into the lightbox slider in just a few seconds.</li>
</ul>

Web Icons

Web Icons plugin gives you scalable vector icons that can instantly be customized. More than 2.5k icons available.

Custom Blocks Templates vs Web Icons