NetSuite's Advanced Modules provide additional advanced functionality around specific processes and/or industry verticals.
NetSuite OneWorld
Delivers a real-time, unified global business management platform for enterprises that manage multinational and multi-subsidiary operations—at a fraction of the cost of traditional onpremise ERP solutions.
Take a look
NetSuite SuiteCommerce Add On's
SuiteCommerce Site Builder | Advanced Site Customization/Dynamic, Database-Driven Hosted Site
Take a lookNetSuite Suite Analytics Connect
SuiteAnalytics Connect | Access and query NetSuite data using SQL
Take a lookNetSuite Suite Grid Order Management
Grid Order Management | Multi-attribute SKUs
Take a lookThese are just a few modules which are available to help extend NetSuite.
You can learn more about other NetSuite Advanced Modules and download a datasheet