Surprisingly i found a very simple with very attractive user interface invoicing software. It can easily generate a quite professional quotation and invoice. It include delivery note as well but i'm not using it. It come with professional invoice template and we can customize the quotations & invoices's template field and wording and also can upload company logo.
It's very user friendly and the search feature is also very simple. Just nice customer maintenance module, and reporting module.
For the paid version, a very simple inventory module included in the software. Payment receive module and revenue reporting module. One thing want to highlight here is that the reports can drill down to more details level. Love it.