Here is a list of plugins that are not allowed:

• adminer
• backupwordpress
• async-google-analytics
• backup
• backup-scheduler
• backwpup
• broken-link-checker
• bad behavior
• contextual-related-posts
• content-molecules
• duplicator
• dynamic-related-posts
• file-commander
• ewww-image-optimizer
• ezpz-one-click-backup
• fuzzy-seo-booster
• yet-another-featured-posts-plugin
• yet-another-related-posts-plugin
• wp-file-cache
• wp-phpmyadmin
• wp-slimstat
• wp-symposium-alerts
• wp-super-cache
• wp-mailinglist
• wp-postviews
• wp-engine-snapshot
• wp-db-backup
• wp-dbmanager
• wordfence
• wp-cache
• wp-database-optimizer
• w3-total-cache
• tweet-blender
• versionpress
• toolspack
• text-passwords
• sweetcaptcha-revolutionary-free-captcha-service
• the-codetree-backup
• spamreferrerblock
• sspro
• ssclassic
• super-post
• similar-posts
• superslider
• si-captcha-for-wordpress
• recommend-a-friend
• seo-alrp
• quick-cache-pro
• quick-cache
• jumpple
• no-revisions
• missed-schedule
• jr-referrer
• hello.php
• hcs.php
• google-xml-sitemaps-with-multisite-support
• gd-system-plugin
• gd-system-plugin.php
• hc-custom-wp-admin-url
• ozh-who-sees-ads
• portable-phpmyadmin
• wordpress-gzip-compression
• wponlinebackup