Billing with a little bit of Merlin Magic
Merlin is a great professional project management application with advanced features such as resource allocation, utilization views and much more.

Now, you can save time and effort by publishing your Merlin activities to Billings and gain some great quoting and invoicing conveniences.

1) Select one or more activities in Merlin
Merlin open with 2 rows (activities) selected
2) Publish to Billings
You can choose to send the activities as estimate slips, invoice slips with no values for time tracking and working slips with costs defined in Merlin.
The publish window in Merlin
3) Send the invoice
The send invoice window in Billings open to the Preview tab
4) Track payments and who owes you
Unpaid Invoices report
Learn more about Merlin
Download Merlin (~ 30 MB)

* Requires Merlin 2.0.4 or higher