HI
As for as your requirement is concerned below are some major points..
1. we have developed multiple accounting system , offline , online and Android version.
*** we can give a demo of these applications when ever you like to have.
2. These application has been made in C#, SQl Server 2008 R2. we have used Dev Express Controls to make user interface more better and and give best feature with much labour,
3. These applications are for European , US and India Customer .
4. We are from New Delhi (India) so you can reach us any time over phone.
5. we have a Team of 25 Professional developer which have their expertise in delivering successful solution to customer around the world.
6. Since we had delivered multiple accounting application to our customer so we know almost every bit of the accounting application like Quotation , orders, invoice , back orders , suppliers , payments, deliveries , Return delivery , customers , Payment Reminders , Report management , Final Calculation , Employee , Employees Schedule , Tariff , Items Management , Payment terms, User/Role Management etc.
Note : we need to discuss in detail what we need to develop in this application. The time frame for development the application and cost will vary as per the final requirement. I would like to make this thing clear that we can add new modules whenever you like to have even after 10 years from now.
Waiting to hear from you.