a good customers/ticketing solution?

[Hetz Ben Hamo]

Hi,

I wrote a short post in my blog about limits with customers (you can read it
here: http://benhamo.org/wp/?p=1924)

I was wondering if anyone has any recommendation for a good customer
managing solution program which has:
* Web based
* ticketing system (that customer can register/login and submit his
problems)
* hebrew support (at least in the customer's front end)
* open source
* if possible, supports shekels, VAT, and can create  invoices

Any recommendation for such  an app?

Thanks,
Hetz
-- 
my blog (hebrew): http://benhamo.org
Skype: heunique
MSN: hetz-blog at benhamo.org
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