MIP Fund Accounting™ is a configurable fund accounting solution. The solution includes functionality for fund accounting, procurement, budgeting, payroll, human resources, timekeeping, fixed asset management, grant management, and dashboards for nonprofits and government agencies.
QuickBooks Online is a SaaS version of the QuickBooks product. It contains all of the features found in the local version. Higher-priced plans include greater automation, payment management, inventory and time tracking, and analytics features.
This would work well for the back side of accounting...meaning after the invoice was created. If you need software to create invoices, this may not be the software for you (or at least you would have to do additional research on its capability). Other than that, it takes care of the majority of our needs.
Unit4 Financials is definitely much more robust than Peachtree or other software. I've also used SAP in the past and this seems to have many more capabilities.