I've been waiting for a good/better replacement for the old zimbra toaster and this really sounded good.
After starting it up I found that its not a free program but is running in demo mode until you enter a serial number.
From their webpage:
Evaluation version will display a buy reminder three hours after started. You can exit and restart it as many times as you want.
Single user license will let you use a specific mail username in unlimited zimbra mail domains. ($14.99)
Domain license will let you have unlimited users using it, within a specific mail domain. ($99.99)
After entering in my info it crashed twice:
Faulting application zimbranotifier.exe, version 188.8.131.52, faulting module unknown, version 0.0.0.0, fault address 0x001543d8.
On the 3rd time it did stay running and checked my mail successfully.
I really like that it lets you omit or notify for certain folders...I wish it also had the same feature for calendars though.