We've tried many other invoicing programs and have found Nevitium to be easy to use with a "one minute learning curve". We need simple and fast for our quotes and invoices and that is where Nevitium excels. QuickBooks cost us a small fortune and takes forever to learn. For a small business such as ours it is not worth the hassle to have to teach each new employee the ins and outs of QuickBooks.
...Nevitium ...is the antidote to all those complex bloatware commercial programs on the market, although it certainly doesn't scrimp on features. It comes with full internationalisation, payment tracking, statements, packing slips, and outstanding invoice reports. It also supports barcode and address label printing and works on Linux, Windows and Mac. Nice one!