The Xero Java Sample Code by Xero presents how to implement accounting features, offering callbacks requests and sample data as resources. Developers can implement inventory, invoicing, and purchasing methods after studying the introductory example.
Cashboard appears to be a full featured and mature time-tracking and invoicing system. It’s been about 9 months since the company opened its system up with its Cashboard API in beta, which continues to this day. The customer testimonials are quite persuasive and could lead to removing that manual Excel spreadsheet approach from the equation. After all, we're much more web savvy, right?