David Arnado

Supercharge your WordPress site with Caledros Basic Blocks – a collection of 18 lightweight, performance-optimized Gutenberg blocks designed to extend the capabilities of the WordPress block editor without slowing down your site.
Unlike many block libraries that add unnecessary bloat, Caledros Basic Blocks focuses on efficiency and speed. Each block is crafted to deliver essential functionality while keeping your site lean.
The plugin includes a built-in CSS stylesheet preloader, ensuring faster page load times by optimizing the delivery of block styles. This feature can be easily disabled if preferred, giving you full control over performance tuning.
<h3>Features</h3>
<ul>
<li>Adds 18 new custom Gutenberg blocks, and 2 new variation blocks. 4 blocks and 1 variation block are only available for header template parts. 1 block (Content Renderer) is limited to templates. </li>
<li>Flex and grid containers blocks included</li>
<li>Dark/Light mode block included</li>
<li>Blocks built with performance and minimalism in mind</li>
<li>Includes a toggleable preloader for CSS stylesheets to improve loading speed</li>
<li>Includes toggleable controls for adding/removing pre-defined CSS styles to the “wp-site-blocks” container.</li>
<li>Enable featured images for post categories</li>
<li>Clean, modern design for seamless visual integration</li>
<li>Fully responsive and compatible with Full Site Editing Themes</li>
</ul>
Perfect for developers, designers, and content creators who want more control and better performance without the overhead of large block libraries.
<h3>More Projects & Information</h3>
For more information about my projects, you can visit my website: <a href="https://caledrosforge.com/" rel="nofollow ugc">caledrosforge.com</a>
<h3>Third Party Resources</h3>
Caledros Basic Blocks bundles the following third-party resources:
<h3>1. Icons</h3>
1.1. Bootstrap Icons, Copyright (c) 2019-2024 The Bootstrap Authors
The icons (SVG files) used in the Icon block, Social Icon block, and the Button Block were downloaded from Bootstrap Icons.
Additionally, the four icons used in the Posts Loop block (user, date, category, and tag) as well as the publications icon in the Category Loop block, were all sourced from Bootstrap Icons.
Bootstrap Icons are licensed under the MIT License.
Source: <a href="https://github.com/twbs/icons" rel="nofollow ugc">Bootstrap Icons Github repository</a> and <a href="https://icons.getbootstrap.com/" rel="nofollow ugc">Bootstrap Icons website</a>
License information last verified on: May 21st, 2025
<h3>2. Libraries</h3>
2.1. Swiper JS, Copyright (c) 2019 Vladimir Kharlampidi
Both the Slider block and the Image Gallery block use the Swiper JS library, which is licensed under the MIT License.
Source: <a href="https://github.com/nolimits4web/swiper" rel="nofollow ugc">Swiper JS Github repository</a> and <a href="https://swiperjs.com/" rel="nofollow ugc">Swiper JS website</a>
License information last verified on: May 14th, 2025
<h3>3. Images</h3>
3.1. Placeholder Mountains (placeholder-mountains.webp, placeholder-mountains.7da2eb2d.webp)
Used in the Category Loop and Posts Loop blocks.
<a href="https://creativecommons.org/publicdomain/zero/1.0/" rel="nofollow ugc">CC0</a> licensed <a href="https://wordpress.org/photos/photo/85161bd2cb/" rel="ugc">photo</a> by <a href="https://wordpress.org/photos/author/mkaz/" rel="ugc">Marcus Kazmierczak</a> from the <a href="https://wordpress.org/photos/" rel="ugc">WordPress Photo Directory</a>
Source: <a href="https://wordpress.org/photos/photo/85161bd2cb/" rel="ugc">WordPress Photo Directory</a>
License information last verified on: September 7th, 2025
3.2. Bird (bird.webp, bird.8dbbb5a8.webp)
Used in the Image Gallery block.
<a href="https://creativecommons.org/publicdomain/zero/1.0/" rel="nofollow ugc">CC0</a> licensed <a href="https://wordpress.org/photos/photo/715678e819/" rel="ugc">photo</a> by <a href="https://wordpress.org/photos/author/snilesh/" rel="ugc">Nilesh Shiragave</a> from the <a href="https://wordpress.org/photos/" rel="ugc">WordPress Photo Directory</a>
Source: <a href="https://wordpress.org/photos/photo/715678e819/" rel="ugc">WordPress Photo Directory</a>
License information last verified on: September 7th, 2025
3.3. Flower (flower.webp, flower.1092b3c8.webp)
Used in the Image Gallery block.
<a href="https://creativecommons.org/publicdomain/zero/1.0/" rel="nofollow ugc">CC0</a> licensed <a href="https://wordpress.org/photos/photo/763688069f/" rel="ugc">photo</a> by <a href="https://wordpress.org/photos/author/churaclicks/" rel="ugc">Chura Bhandari</a> from the <a href="https://wordpress.org/photos/" rel="ugc">WordPress Photo Directory</a>
Source: <a href="https://wordpress.org/photos/photo/763688069f/" rel="ugc">WordPress Photo Directory</a>
License information last verified on: September 7th, 2025
3.4. Mountains (mountains.webp, mountains.2b50cd4a.webp)
Used in the Image Gallery block.
<a href="https://creativecommons.org/publicdomain/zero/1.0/" rel="nofollow ugc">CC0</a> licensed <a href="https://wordpress.org/photos/photo/62068b050a/" rel="ugc">photo</a> by <a href="https://wordpress.org/photos/author/abishkaarchettri/" rel="ugc">ABISHKAAR CHETTRI</a> from the <a href="https://wordpress.org/photos/" rel="ugc">WordPress Photo Directory</a>
Source: <a href="https://wordpress.org/photos/photo/62068b050a/" rel="ugc">WordPress Photo Directory</a>
License information last verified on: September 7th, 2025

Caledros Basic Blocks

Introduces 18 lightweight blocks for the Gutenberg editor. Also includes an optional preloader for CSS stylesheets to enhance performance.

Akrit Singha

Modular Blocks Core is a powerful yet lightweight WordPress plugin that allows you to create custom, reusable Gutenberg blocks without the bloat of third-party page builders. Built for developers and power users who want full control over their code while maintaining optimal site performance.
<h3>Key Features</h3>
<ul>
<li>🎨 Custom Block Builder – Create unlimited custom Gutenberg blocks with an intuitive admin interface</li>
<li>⚡ Lightweight & Fast – Zero bloat, minimal overhead, loads assets only when needed</li>
<li>🔄 Block Inheritance – Fork blocks into inherited versions for page-specific modifications</li>
<li>📝 Advanced Code Editors – Integrated CodeMirror editors for PHP, CSS, and JavaScript</li>
<li>💾 Import/Export – Share blocks between sites or backup your work</li>
<li>🎯 Dynamic Content – Full PHP support for dynamic, data-driven blocks</li>
<li>🛡️ Royal Classic UI – Beautiful, modern admin interface with glassmorphism design</li>
<li>🔍 Smart Search – Quickly find and manage all your custom blocks</li>
<li>📦 Zero Dependencies – No reliance on third-party libraries or frameworks</li>
</ul>
<h3>Perfect For</h3>
<ul>
<li>Developers building custom WordPress themes</li>
<li>Agencies managing multiple client sites</li>
<li>Site owners who want full control without page builder bloat</li>
<li>Anyone seeking maximum performance and maintainability</li>
</ul>
<h3>How It Works</h3>
<ol>
<li>Create custom blocks using the built-in admin interface</li>
<li>Write your block’s HTML, CSS, and JavaScript (or PHP for dynamic content)</li>
<li>Blocks are automatically compiled and registered with Gutenberg</li>
<li>Use your blocks in the WordPress editor like any native block</li>
<li>Inherit and modify blocks for specific pages without affecting the original</li>
</ol>
<h3>Technical Highlights</h3>
<ul>
<li>Clean Architecture – Modular, well-organized codebase</li>
<li>WordPress Standards – Follows all WordPress coding standards and best practices</li>
<li>Performance Optimized – Conditional asset loading, minimal database queries</li>
<li>Extensible – Built with developers in mind, easy to extend and customize</li>
<li>CPT-Based Storage – Uses WordPress Custom Post Types for block management</li>
<li>Compiled Output – Generates optimized block files stored in wp-uploads</li>
</ul>
<h3>Credits</h3>
Developed by Akrit Singha with a focus on performance, simplicity, and developer experience.
<h3>Support</h3>
For support, feature requests, or bug reports, please visit the <a href="https://wordpress.org/support/plugin/modular-blocks-core/" rel="ugc">plugin support forum</a>.
<h3>Privacy</h3>
This plugin does not collect or transmit any user data. All block definitions and content remain on your WordPress installation.

Modular Blocks Core

A lightweight, custom framework for building dynamic, reusable Gutenberg blocks with minimal overhead and maximum performance.

Caledros Basic Blocks vs Modular Blocks Core