Nekto

Nekto Core enhances your WordPress site by adding a new custom post type called Projects, with associated categories, a shortcode to display them, a meta box for client info, and a widget to show the latest projects.
<h3>Translation ==\nThis plugin is translation ready. Use the .pot file in /languages.\n\n== Installation</h3>
<ol>
<li>Upload the plugin files to <code>/wp-content/plugins/nekto-core</code>.</li>
<li>Activate the plugin through the ‘Plugins’ screen in WordPress.</li>
<li>Use the shortcode <code>[nekto_projects number="5"]</code> in any post or page.</li>
</ol>

Nekto Core

Adds custom post types, categories, meta boxes, shortcodes, and widgets for displaying projects.

themesty

Sierra Addons add features to <a href="https://wpsierra.com/" rel="nofollow ugc">WP Sierra</a> theme: 
– meta boxes which gives you the ability to set pages transparent headers and alternative logo in header 
– Elementor widgets like: 
 * WP Sierra Button 
 * WP Sierra Posts 
– WP Sierra demo sites
IMPORTANT: this plugin requires <a href="https://wpsierra.com/" rel="nofollow ugc">WP Sierra</a> theme to be installed to work.

Sierra Addons

Plugin with extra features for WP Sierra theme.

Nekto Core vs Sierra Addons