Can anyone recommend good invoicing software for a sole proprietor / freelance? I have 3500+ customers so I cannot use watered down free online versions that limit you. I also want to avoid paying a monthly fee. I would prefer a desktop program rather than online as those can also be slow and what happens when that company no longer exists? I want to control my data I have used Billings for many years. They went to a subscription service years ago. They no longer update their desktop software and the "pro" version has had very few updates in many years. At some point the desktop version won't work with future versions of OSX as they are not 64 bit. Every time I update my OS I am afraid it will break the software The only major player I see is Quickbooks. Any other options?