Group Plugin Recommendations!

Useful Tools

Child Theme Configurator
Imsanity
TinyMCE Advanced
Black Studio TinyMCE Widget
Visual Term Description Editor
SumoMe | Free Tools to grow your Email List, Social Sharing and Analytics
Really Simple SSL
Jetpack by WordPress.com
Google Analytics by MonsterInsights
CSS Hero
Akismet
Duplicate Post

Managing Meta Data

Advanced Custom Fields
Pods – Custom Content Types and Fields
CMB2

Security

iThemes Security (formerly Better WP Security)
Sucuri Security – Auditing, Malware Scanner and Security Hardening
Wordfence Security

SEO

Yoast SEO
All in One SEO Pack

Marketing

Boxzilla
OptinMonster – Best WordPress Popup and Lead Generation Plugin
Call Now Button

Form Builders

Contact Form by WPForms – Drag & Drop Form Builder for WordPress
Ninja Forms
Caldera Forms – Drag and drop responsive WordPress form builder
Gravity Forms
Formidable Forms

Backup and Migration

All-in-One WP Migration
UpdraftPlus WordPress Backup Plugin
Backup Buddy
WP Migrate DB

Sliders

Slider by Soliloquy – Responsive Image Slider for WordPress
Huge-IT | Responsive Slider
RoyalSlider

Galleries

Gallery by Envira – Responsive Photo Gallery for WordPress
NextGEN Gallery – WordPress Gallery Plugin

On Site Search

FaccetWP
SearchWP
Relevanssi

Page Builders

Beaver Builder – WordPress Page Builder
Page Builder by SiteOrigin

Big Features

WP Job Manager
The Events Calendar
WooCommerce
Easy Digital Downloads
BuddyPress
bbPress