Use Discount Amount instead of Percent on Purchase Order Line
Create Request for Quotation from Opportunity
Add new option in Price List Version to calculate price based on last invoice
Product Supplier Info
Replicate Unit of Sales concept from Sales but for Purchase
Set Invoice Method of PO to 'picking', unless if it's service-only
Purchase Control Supplier
Update of date planned on PO line updates date on stock move
Allow several enhancements on purchase management
Adds reception status on PO lines