1 – Elementor
It’s about time for a live page builder, with no limits of design. A page builder that delivers high-end page designs and advanced capabilities, never before seen on WordPress. Elementor
2- CMB2
CMB2 is a developer’s toolkit for building metaboxes, custom fields, and forms for WordPress that will blow your mind. Easily manage meta for posts, terms, users, comments, or create custom option pages. CMB2
3-One Click Demo Import
The best feature of this plugin is, that theme authors can define import files in their themes and so all you (the user of the theme) have to do is click on the “Import Demo Data” button. One Click Demo Import
4- Redux Framework
Redux is a simple, truly extensible and fully responsive options framework for WordPress themes and plugins. Built on the WordPress Settings API, Redux supports a multitude of field types as well as: custom error handling, custom fields & validation types, and import/export functionality. Redux Framework
5- Max Mega Menu
Max Mega Menu will automatically convert your existing menu or menus into a mega menu. You can then add any WordPress widget to your menu, restyle your menu using the theme editor and change the menu behaviour using the built in settings. Max Mega Menu is a complete menu management plugin, perfect for taking control of your existing menu and turning it into a user-friendly, accessible and touch ready menu with just a few clicks.. Max Mega Menu
6- Woocommerce
WooCommerce is a flexible, open-source eCommerce solution built on WordPress. Whether you’re launching a business, taking an existing brick and mortar store online, or designing sites for clients you can get started quickly and build exactly the store you want. Woocommerce
7- Contact Form 7
Contact Form 7 can manage multiple contact forms, plus you can customize the form and the mail contents flexibly with simple markup. The form supports Ajax-powered submitting, CAPTCHA, Akismet spam filtering and so on. Contact Form7