The Wordfence WordPress security plugin provides free enterprise-class WordPress security, protecting your website from hacks and malware.
Simple but effective plugin allows you to extensively clean up your WordPress database and optimize it without doing manual queries.
An exceptionally powerful WordPress anti-spam plugin that eliminates comment spam, trackback spam, contact form spam & registration spam.
The most powerful user, role, and capability management plugin for WordPress.
WordPress Website Security Protection: Firewall Security, Login Security, Database Security... Effective, Reliable, Easy to use...
Adds an avatar upload field to user profiles. Generates requested sizes on demand just like Gravatar!
Redirect users to different locations after logging in and logging out.
Customise columns on the administration screens for post(types), pages, media, comments, links and users with an easy to use drag-and-drop interface.
Instant switching between user accounts in WordPress.
Analyze your visitors traffic with real-time statistics, a lot of chronological information, charts, a sidebar widget.
Displays Visitor Maps with location pins, city, and country. Includes a Who's Online Sidebar. Has an admin dashboard to view visitor details.
View changes made by users within WordPress. See who created a page, uploaded an attachment or approved an comment, and more.
Enable you to display how many users are online on your WordPress blog with detailed statistics.
The easiest way to create powerful online communities and beautiful user profiles with WordPress
Provides a thumbnail area in Your Profile, for users to upload & crop new images in an overlay to be saved and stored to their profile.
Security against brute force attacks by tracking IP, name, password; requiring very strong passwords. Idle timeout. Maintenance mode lockdown.
Simple, yet elegant. Shows IDs for Posts, Pages, Media, Links, Categories, Tags, and Users in the admin tables for easy access. Very lightweight. Also
Export store details out of WooCommerce into simple formatted files (e.g. CSV, XML, Excel 2007, XLS, etc.).
Allows you to disable Dashboard access for users of a specific role or capability. Disallowed users are redirected to a chosen URL.
WP-Sweep allows you to clean up unused, orphaned and duplicated data in your WordPress. It also optimizes your database tables.
Assign multiple bylines to posts, pages, and custom post types via a search-as-you-type input box
Analytics Stats Counter Statistics plugin analyse visitors statistics on your web page, unique users, countries, city's, IPs.
Efficient many-to-many connections between posts, pages, custom post types, users.
Use your email address instead of a username to log into your WordPress.
This plugin keeps a log of WordPress user logins. Offers user and date filtering, and export features.
New User Approve allows a site administrator to approve a user before they are able to login to the site.
Starbox is the Author Box for Humans. Professional Themes to choose from, HTML5, Social Media Profiles, Google Authorship
Export users data and metadata to a csv file
Allows the site editors to send an e-mail to the blog users. Credits to Catalin Ionescu who gave me (Vincent Pratt) some ideas for the plugin and has