| pm_Hook_Backup | Interface for backup and restore hooks |
| pm_Hook_Interface | Generic interface for hooks |
| pm_ActionLog | Wrapper for ActionLog. |
| pm_ApiCli | Gateway for execution of CLI utilities |
| pm_ApiRpc | Wrapper to simplify execution of API-RPC calls inside modules |
| pm_Application | Class for initialization Plesk renderers |
| pm_Bootstrap | Class for initialization Plesk objects |
| pm_Client | Panel client wrapper |
| pm_Config | Configuration settings reader (panel.ini settings) |
| pm_Context | Define module constants and setup context |
| pm_Controller_Action | Abstract class for all extensions controllers |
| pm_Domain | Domain wrapper |
| pm_Exception | Exception raised in case of modules API problems |
| pm_Exception_InvalidArgumentException | Exception raised in case of invalid arguments passed in SDK methods |
| pm_Exception_ResultException | Exception raised in case of non-zero exit code of utilities |
| pm_FileManager | Manager of hosted files for module (webspace level). |
| pm_FileManager_Action | Content action for FileManager |
| pm_Form_Simple | Base form |
| pm_Form_SubForm | Sub Form |
| pm_Hook_ActionLog | Hook for registering events |
| pm_Hook_ActiveList | Abstract class for injection into active lists |
| pm_Hook_ApiCli | Hook for processing remote API-CLI requests |
| pm_Hook_ApiRpc | Hook for processing remote API-RPC requests |
| pm_Hook_Applications | Hook for applications |
| pm_Hook_Auth | Custom authentication mechanism |
| pm_Hook_Backup_Client | Hook for backing up and restoring clients |
| pm_Hook_Backup_Domain | Hook for backing up and restoring domains |
| pm_Hook_Backup_Server | Hook for backing up and restoring the server configuration |
| pm_Hook_ConfigDefaults | Hook for extension config defaults (panel.ini settings) |
| pm_Hook_ContentInclude | Abstract class for content injection into Plesk pages |
| pm_Hook_CustomButtons | Hook for custom buttons embedding |
| pm_Hook_Form | Abstract class for injection into form |
| pm_Hook_ForwardedApiCli | Hook for interception of API-CLI execution |
| pm_Hook_ForwardedApiRpc | Hook for interception of API-RPC execution |
| pm_Hook_Limits | Hook for registering limits |
| pm_Hook_LoginContentInclude | Abstract class for content injection into login page |
| pm_Hook_LongTasks | Hook for registering long tasks |
| pm_Hook_Navigation | Hook for navigation embedding |
| pm_Hook_Notifications | Hook for Notifications |
| pm_Hook_Permissions | Hook for registering permissions |
| pm_Hook_PlanItems | Hook for additional plan items |
| pm_Hook_SimpleList | Abstract class for injection into list |
| pm_Hook_Supervisor | Abstract class for supervisor control of other hooks |
| pm_Hook_SystemServices | Hook for registering services provided by extension |
| pm_Hook_WebServer | Abstract class for injection into web servers config |
| pm_License | Panel license keys management class |
| pm_Loader | Code classes autoloader |
| pm_Locale | Localization facilities |
| pm_Log | Class pm_Log Intended to log various data. |
| pm_LongTask_Manager | Manager of long tasks. |
| pm_LongTask_Task | Long task object |
| pm_Navigation_OverviewPage | Base class for object's overview pages |
| pm_Navigation_Page | Base class for Zend_Navigation_Page pages |
| pm_Notification | Notification manager |
| pm_Plan | Service Plan wrapper |
| pm_ProductInfo | Plesk options / info |
| pm_Promo_AdminHome | Promo block for admin home page |
| pm_Promo_CustomerHome | Promo block for customer (on Websites&Domains page) |
| pm_Promo_Home | Promo block for admin home page. This class is deprecated in favor to pm_Promo_AdminHome. |
| pm_Scheduler | Manager of regular tasks for module. |
| pm_Scheduler_Task | Regular task representation. |
| pm_ServerFileManager | Manager of files on server level. |
| pm_Session | Representation of panel session |
| pm_Settings | Manager of module settings |
| pm_SystemService_Service | Service provided by extension |
| pm_View_Helper_ActiveList | Helper for rendering active list |
| pm_View_Helper_BaseUrl | Helper for prepending URL with base URL |
| pm_View_Helper_DomainOverviewUrl | Helper for building URL to Domain Overview page |
| pm_View_Helper_Lmsg | Helper for translating messages |
| pm_View_Helper_RenderList | Helper for rendering list in view |
| pm_View_Helper_RenderSmallTools | Helper for rendering small buttons in view |
| pm_View_Helper_RenderTabs | Helper for rendering tabs in view |
| pm_View_Helper_RenderTools | Helper for rendering big buttons in view |
| pm_View_List_Simple | Base list |
| pm_View_Status | Status messages helper |
| pm_WebServer | Web server manager |