MTS Line Items is a tool to help you link your products and services to the Opportunities module. With it you can easily track both products and services that a customer has bought. It also supports converting an Opportunity to a Quote, Contract, or Invoice for a customer. Works with exporting to PDF, sending an Opportunity as a PDF, etc.
Other add-ons of interest
Sapiens.BI Basic - Analytic Reporting
Dynamic Reports and Interactive Charts.
Powerful tool for SuiteCRM report creation and data analytics. Includes a variety of chart types, detailed, summary and pivot tables. This Reporting Tool is for anyone, no need for technical knowledge or SQL. Comes with over a hundred prebuilt reports.