We currently sync GL account, GL history, IN item cost, IN item cost history, IN register, IN site, IN site status, IN tran, Inventory item, Inventory item cury settings, Organization, SO shipment line, SO shipment, Account, Attribute definition, Bill, Contact, Currency, Customer, Customer location, Invoice, Item class, Purchase order, Sales invoice, Sales order, Salesperson, Stock item, Vendor, Bill detail, Contact address, Contact case, Customer contact, Customer salesperson, Invoice detail, Invoice discount detail, Purchase order tax detail, Purchase order detail, Sales invoice detail, Sales order bill to address, Sales order totals, Sales order ship to address, Sales order detail and Vendor contact (see our Data Model for full details). If there's something else you need just ask.