In working with different clients, we've seen that there are several accounting software programs that fit different businesses.

Xero, Netsuites, and Zoho are more in-depth for accounting. Freshbooks and Wave are simple programs for invoicing and billing.

I've seen others trying to go back to Quickbooks Desktop, but I have a colleague who has been getting messages saying that Intuit is determined to get them to migrate to online this year and will be sunsetting desktop features, so I don't know if I can recommend it.