A map between Magento 2 and Magento 1.x names

Development
1
Magento 1.x Magento 2
controller_action_layout_generate_blocks_after layout_generate_blocks_after
core_resource setup_module
core_url_rewrite url_rewrite
Mage_Core_Block_Abstract Magento\Framework\View\Element\AbstractBlock
Mage_Core_Block_Template Magento\Framework\View\Element\Template
Mage_Core_Controller_Varien_Action Magento\Framework\App\Action\Action
Mage_Core_Exception Magento\Framework\Exception\LocalizedException
Mage_Core_Model_Abstract Magento\Framework\Model\AbstractModel
Mage_Core_Model_Locale::DEFAULT_LOCALE Magento\Framework\Locale\Resolver::DEFAULT_LOCALE
Mage_Core_Model_Resource Magento\Framework\Model\ModelResource\AbstractResource
Mage_Core_Model_Resource_Db_Abstract Magento\Framework\Model\ModelResource\Db\AbstractDb
Mage_Core_Model_Store Magento\Store\Model\Store
Mage_Core_Model_Translate::CACHE_TAG Magento\Framework\App\Cache\Type::CACHE_TAG
Varien_Data_Collection Magento\Framework\Data\Collection
Varien_Db_Adapter_Interface Magento\Framework\DB\Adapter\AdapterInterface
Varien_Db_Adapter_Pdo_Mysql Magento\Framework\DB\Adapter\Pdo\Mysql
Varien_Db_Select Magento\Framework\DB\Select
Varien_Object Magento\Framework\DataObject
Varien_Simplexml_Element Magento\Framework\Simplexml\Element
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Maps from the official code migration tool

A map between classes

Unmapped Magento 1.x classes

A map berween modules

A map between tables