Delta Accounting is a free software for accounting. This accounting software has a look of spaceship at a glance. It's an integrated accounting software that includes: Sales Invoicing, Inventory, Account Receivable, Account Payable, Payroll and General Ledger. It can accomplish your basic accounting computer needs. This program comes with two version which you can switch by clicking on a button. Click
here to visit the site. You can also find a demo on how to buy and sell items on the site.