Netzcart gives you a way to generate reports and other stats directly from your admin panel and download as CSV file:

 

Order Totals Summary by Date
Order Totals Details by Date
Sales Totals
Sales Totals By Coupon
Items Sold By User
Items Already Shipped
Items waiting To Be Shipped
Top Sellers Items
Total Monthly New Users
Total Monthly Sales By Users
Daily Order Totals for Affiliates
Daily Order Totals - Grouped by Affiliate

Oak Street POS CSV Export - Orders/Items