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.

NetSuite SuiteCommerce Add On's

SuiteCommerce Site Builder | Advanced Site Customization/Dynamic, Database-Driven Hosted Site

NetSuite Suite Analytics Connect

SuiteAnalytics Connect | Access and query NetSuite data using SQL

NetSuite Suite Grid Order Management

Grid Order Management | Multi-attribute SKUs

These 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