WP3.1 multisite "mu-plugin" that allows you to add a user to all sites or no sites. Just drop in mu-plugins.
More Plugins
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Event Tickets Manager for WooCommerce
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Contact Form Dashboard
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PHP Code Widget
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Text Scroll Widget
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Carousel, Slider, Photo Gallery with Lightbox, Video Slider, by WP Carousel
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Advanced Custom Fields Repeater & Flexible Content Fields Collapser
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Safe Redirect Manager
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XCompliant – Accessibility Scan & Audit
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BuddyPress Featured Members
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Hello I am here! Video conferences
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Connector for Gravity Forms and Google Sheets
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Twenty Eleven Theme Extensions
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PublishPress Blocks – Block Controls, Block Visibility, Block Permissions
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Popups – Submission Messages For Contact Form 7
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Skill Bars
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Image Hover Effects Ultimate ( Image Gallery, Effects, Lightbox, Comparison & Magnifier )
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SureContact – Newsletters, Email Marketing, Automation, Revenue Tracking & CRM
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Translate Website & Rank Globally with SEO & GEO – MultiLipi AI Translation
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Custom Post Types and Custom Fields creator – WCK
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(Simply) Guest Author Name