Zoho Invoice - 100% free online invoicing software for small businesses.
Inveezy.com - Inveezy is a free invoicing website with no login.
Monzia - Monzia can help you save money, relieve stress and make time for the fun things in life.
Kamerge - Kamerge simplifies & systemizes the key processes of your business.
Bill.com - Bill.com provides ACH payments processing, automates your accounts payable and accounts receivable processes.
TurboCASH - TurboCASH Accounting Free and Open Source Accounting Software for Small to Medium Business.