NetSuite - NetSuite is the leading integrated cloud business software suite, including business accounting, ERP, CRM and ecommerce software.
Xero - Xero is online accounting for your small business.
Odoo - Free ERP and CRM. Download Odoo or use it in the cloud. Grow Your Business.
Avaza - Beautiful Projects, Timesheets, Expenses, Quotes & Invoices for Small Businesses
HarmonyPSA - HarmonyPSA - Professional Services Automation (PSA) for IT Businesses
QuickBooks Online - QuickBooks Online is a Cloud Accounting for small business that can be used on iPad, mobile phone or computer to do invoicing, billing, run reports, or even pay employees online.