24 classes are annotated with Action

AddRoleUser in drupal/core/modules/user/lib/Drupal/user/Plugin/Action/AddRoleUser.php
Adds a role to a user.
AssignOwnerNode in drupal/core/modules/node/lib/Drupal/node/Plugin/Action/AssignOwnerNode.php
Assigns ownership of a node to a user.
BlockUser in drupal/core/modules/user/lib/Drupal/user/Plugin/Action/BlockUser.php
Blocks a user.
CancelUser in drupal/core/modules/user/lib/Drupal/user/Plugin/Action/CancelUser.php
Cancels a user account.
DeleteNode in drupal/core/modules/node/lib/Drupal/node/Plugin/Action/DeleteNode.php
Redirects to a node deletion form.
DemoteNode in drupal/core/modules/node/lib/Drupal/node/Plugin/Action/DemoteNode.php
Demotes a node.
EmailAction in drupal/core/modules/action/lib/Drupal/action/Plugin/Action/EmailAction.php
Sends an e-mail message.
GotoAction in drupal/core/modules/action/lib/Drupal/action/Plugin/Action/GotoAction.php
Redirects to a different URL.
MessageAction in drupal/core/modules/action/lib/Drupal/action/Plugin/Action/MessageAction.php
Sends a message to the current user's screen.
NoType in drupal/core/modules/system/tests/modules/action_test/lib/Drupal/action_test/Plugin/Action/NoType.php
Provides an operation with no type specified.
PromoteNode in drupal/core/modules/node/lib/Drupal/node/Plugin/Action/PromoteNode.php
Promotes a node.
PublishComment in drupal/core/modules/comment/lib/Drupal/comment/Plugin/Action/PublishComment.php
Publishes a comment.
PublishNode in drupal/core/modules/node/lib/Drupal/node/Plugin/Action/PublishNode.php
Publishes a node.
RemoveRoleUser in drupal/core/modules/user/lib/Drupal/user/Plugin/Action/RemoveRoleUser.php
Removes a role from a user.
SaveComment in drupal/core/modules/comment/lib/Drupal/comment/Plugin/Action/SaveComment.php
Saves a comment.
SaveEntity in drupal/core/modules/system/tests/modules/action_test/lib/Drupal/action_test/Plugin/Action/SaveEntity.php
Provides an operation to save user entities.
SaveNode in drupal/core/modules/node/lib/Drupal/node/Plugin/Action/SaveNode.php
Provides an action that can save any entity.
StickyNode in drupal/core/modules/node/lib/Drupal/node/Plugin/Action/StickyNode.php
Makes a node sticky.
UnblockUser in drupal/core/modules/user/lib/Drupal/user/Plugin/Action/UnblockUser.php
Unblocks a user.
UnpublishByKeywordComment in drupal/core/modules/comment/lib/Drupal/comment/Plugin/Action/UnpublishByKeywordComment.php
Unpublishes a comment containing certain keywords.
UnpublishByKeywordNode in drupal/core/modules/node/lib/Drupal/node/Plugin/Action/UnpublishByKeywordNode.php
Unpublishes a node containing certain keywords.
UnpublishComment in drupal/core/modules/comment/lib/Drupal/comment/Plugin/Action/UnpublishComment.php
Unpublishes a comment.
UnpublishNode in drupal/core/modules/node/lib/Drupal/node/Plugin/Action/UnpublishNode.php
Unpublishes a node.
UnstickyNode in drupal/core/modules/node/lib/Drupal/node/Plugin/Action/UnstickyNode.php
Makes a node not sticky.