|1||wp-migrate-db||usefull for exporting databas replacing urL and path|
|2||wp-super-cache||usefull for caching|
|3||vegas-fullscreen-background-slider||usefull for background animated images|
|usefull for simple google maps|
|5||insert-php/php-text-widget||usefull for writing php code on post or page type|
|6||wck-custom-fields-and-custom-post-types-creator||usefull for creating custom post type and field and also its font-end php page according its url rules|
|7||wordpress-seo||usefull for SEO friendly|
|8||wordfence||usefull for web security|
|9||visualcaptcha||usefull for capcha on any form|
sitepress-multilingual-cms-master(need to paid)
|usefull for automatically create page type for optional language|
|11||mechanic-visitor-counter||usefull for visitor counter|
|12||download-manager||usefull for create download link|
|13||responsive-slick-slider.1.2.2||usefull for header banner|
|14||clean-login,profile-builder.2.8.7||usefull for custom login,registration,edit registration|
|15||PDF Viewer||usefull for showing pdf file in post,page|
|16||wpschoolpress(paid version,Student Management Plugins)||usefull for Student Management|
|17||wp-mail-smtp||usefull for smtp mail sending|
wordpress has default roles for permission
super-admin-somebody with access to the site network administration features and all other features. See the Create a Network article.
administrator- somebody who has access to all the administration features within a single site
editor-somebody who can publish and manage posts including the posts of other users.
author-somebody who can publish and manage their own posts.
contributor-somebody who can write and manage their own posts but cannot publish them.
subscriber-somebody who can only manage their profile.
search for option name wp_user_roles in the wp_options table