You can export posts in CSV format for each post type. It is compatible with posts' custom fields and custom taxonomies.
WP All Import is an extremely powerful importer that makes it easy to import any XML or CSV file to WordPress.
Advanced CSV Importer plugin to import/export posts, pages, eshop products, custom posts with custom fields with few simple clicks
Easily import products from any XML or CSV file to WooCommerce with the WooCommerce add-on for WP All Import.
JC Importer allows you to easily import users, posts, custom post types and taxonomies from XML and CSV files.
Import Ads+Users from CSV file in ClassiPress Theme