This is a wiki post to list the general types of plugin that users feel they would absolutely require in order to use CP. That is, plugins that people see as deal-breakers. We can then add good, CP-friendly options as they become available.
Security plugin BulletProofSecurity , GD Security Toolbox Pro and Shield are all supporting CP.
eCommerce plugin hopefully we will be getting ClassicCommerce (our fork of WooCommerce) for this one
Advanced editor plugin WYSIWYG Advanced is built for ClassicPress by @CodePotent.
Pagebuilder plugin - [Elementor have already stated they do not support CP.]
Forum plugin -
Contact form plugin -
Caching plugin -
SEO plugin GD SEO Toolbox Pro definitely supports CP
Image slider plugin - MetaSlider have stated they will investigate any problems with future CP versions.
Professional photo gallery plugin - [eg NextGen]
Cookie notice / GDPR plugin -
Redirects plugin -
Role management plugin - [e.g. Members by Justin Tadlock]
Backup Plugin - Akeeba Backup have announced they will supporting CP and said “We’re in for the long ride”.
Remote management plugin InfiniteWP have tested CP and confirmed that everything works (except we can’t use it to update the CP core). They have said they’ll “definitely consider adding full support for ClassicPress in the near future” if there is enough demand.
2-factor authentication plugin - MiniOrange have said they will be testing with all future ClassicPress releases.
Post/Page duplicator plugin We now have Carbon-copy by @codepotent made especially for ClassicPress
Spamblocker plugin -
Subscriber email notification - see this discussion Email subscribers and Notification
SMTP plugin - there is a petition to add this to core - https://petitions.classicpress.net/posts/163/smtp-integration-settings-as-core-plugin