Allow advanced edition for public category attachments
Manage public holidays
Product variants in purchase management
Manage origin / destination / consignee addresses on purchases
In the purchase order, allow automatically complete with partner, the supplierinfo list for all products which are not related to this supplier
Set Analytic Account in Purchase Orders
Purchase managers might manage product attributes
Set Invoice Method of PO to 'picking', unless if it's service-only
odoo module will help you create award latter from purchase order
