Here are the classes, structs, unions and interfaces with brief descriptions:

com.mendix.systemwideinterfaces.core.AuthenticationRuntimeException
com.mendix.systemwideinterfaces.ClientAction
com.mendix.modules.exportmanager.interfaces.Common
com.mendix.core.conf.Configuration
com.mendix.core.Core
com.mendix.core.actionmanagement.CoreAction< R >
com.mendix.core.CoreException
com.mendix.core.CoreRuntimeException
com.mendix.systemwideinterfaces.core.DataValidationRuntimeException
com.mendix.modules.email.EmailModule
com.mendix.modules.exportmanager.ExportManagerModule
com.mendix.systemwideinterfaces.HandlerConstants
com.mendix.core.objectmanagement.member.MendixHashString.HashStruct
com.mendix.systemwideinterfaces.core.IBatch
com.mendix.systemwideinterfaces.core.IChangeBatch
com.mendix.systemwideinterfaces.core.IContext
com.mendix.systemwideinterfaces.core.ICoreAction< R >
com.mendix.systemwideinterfaces.core.ICreateBatch
com.mendix.systemwideinterfaces.connectionbus.data.IDataColumnSchema
com.mendix.systemwideinterfaces.connectionbus.data.IDataRow
com.mendix.systemwideinterfaces.connectionbus.data.IDataSet
com.mendix.systemwideinterfaces.connectionbus.data.IDataTable
com.mendix.systemwideinterfaces.connectionbus.data.IDataTableSchema
com.mendix.systemwideinterfaces.core.IDataType
com.mendix.systemwideinterfaces.core.meta.IDataValidation
com.mendix.systemwideinterfaces.core.IDataValidationFeedback
com.mendix.modules.exportmanager.interfaces.excel.IExcelCell
com.mendix.modules.exportmanager.interfaces.excel.IExcelCellStyle
com.mendix.modules.exportmanager.interfaces.excel.IExcelColumn
com.mendix.modules.exportmanager.interfaces.excel.IExcelGrid
com.mendix.systemwideinterfaces.core.IFeedback
com.mendix.systemwideinterfaces.connectionbus.requests.types.IGetRequest
com.mendix.systemwideinterfaces.connectionbus.requests.types.IIdentifierGetRequest
com.mendix.systemwideinterfaces.core.ILanguage
com.mendix.systemwideinterfaces.core.IMendixIdentifier
com.mendix.systemwideinterfaces.core.IMendixObject
com.mendix.systemwideinterfaces.core.IMendixObjectMember< T >
com.mendix.systemwideinterfaces.core.meta.IMetaAssociation
com.mendix.systemwideinterfaces.connectionbus.requests.IMetaAssociationSchema
com.mendix.systemwideinterfaces.core.meta.IMetaEnumeration
com.mendix.systemwideinterfaces.core.meta.IMetaEnumValue
com.mendix.systemwideinterfaces.core.meta.IMetaObject
com.mendix.systemwideinterfaces.core.meta.IMetaObjectAccess
com.mendix.systemwideinterfaces.core.meta.IMetaObjectIndex
com.mendix.systemwideinterfaces.core.meta.IMetaPrimitive
com.mendix.systemwideinterfaces.connectionbus.requests.types.IOQLTextGetRequest
com.mendix.systemwideinterfaces.connectionbus.requests.IParameterMap
com.mendix.modules.exportmanager.interfaces.pdf.IPDFCell
com.mendix.modules.exportmanager.interfaces.pdf.IPDFCellStyle
com.mendix.modules.exportmanager.interfaces.pdf.IPDFColumn
com.mendix.modules.exportmanager.interfaces.pdf.IPDFGrid
com.mendix.modules.exportmanager.interfaces.pdf.IPDFImageCell
com.mendix.modules.exportmanager.interfaces.pdf.IPDFImageCellStyle
com.mendix.modules.exportmanager.interfaces.pdf.IPDFTextCell
com.mendix.modules.exportmanager.interfaces.pdf.IPDFTextCellStyle
com.mendix.systemwideinterfaces.core.IProfiler
com.mendix.systemwideinterfaces.core.IRemoveBatch
com.mendix.systemwideinterfaces.connectionbus.requests.types.IRequestData
com.mendix.systemwideinterfaces.connectionbus.requests.IRetrievalSchema
com.mendix.systemwideinterfaces.core.ISession
com.mendix.modules.email.interfaces.ISMTPConfiguration
com.mendix.systemwideinterfaces.connectionbus.requests.ISortExpression
com.mendix.systemwideinterfaces.connectionbus.requests.types.ITextGetRequest
com.mendix.systemwideinterfaces.core.IUser
com.mendix.systemwideinterfaces.IWebserviceResponse
com.mendix.systemwideinterfaces.connectionbus.requests.types.IXPathTextGetRequest
com.mendix.systemwideinterfaces.utils.LinkedDualHashBidiMap
com.mendix.core.objectmanagement.member.MendixAutoNumber
com.mendix.core.objectmanagement.member.MendixBinary
com.mendix.core.objectmanagement.member.MendixBoolean
com.mendix.core.objectmanagement.member.MendixCurrency
com.mendix.core.objectmanagement.member.MendixDateTime
com.mendix.core.objectmanagement.member.MendixEnum
com.mendix.systemwideinterfaces.MendixException
com.mendix.core.objectmanagement.member.MendixFloat
com.mendix.core.objectmanagement.member.MendixHashString
com.mendix.core.objectmanagement.member.MendixInteger
com.mendix.core.objectmanagement.member.MendixLong
com.mendix.core.objectmanagement.member.MendixObjectReference
com.mendix.core.objectmanagement.member.MendixObjectReferenceSet
com.mendix.systemwideinterfaces.MendixRuntimeException
com.mendix.core.objectmanagement.member.MendixString
com.mendix.systemwideinterfaces.utils.ReadOnlyList
com.mendix.modules.email.SMTPConfiguration
com.mendix.systemwideinterfaces.core.UserAction< R >
com.mendix.systemwideinterfaces.core.UserActionListener< T extends UserAction<?> >
com.mendix.systemwideinterfaces.core.UserException
com.mendix.modules.webservices.WebserviceException
com.mendix.modules.webservices.WebserviceModule