Yes, both Xero and Nusii offer a Free Trial.
Xero is designed for Freelancers, Medium Business and Small Business.
Nusii is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Nusii begins at $24.16/Month when Billed Yearly, while pricing details for Xero are unavailable.
Some top alternatives to Xero includes Quickbooks, Sage Accounting (Sage One), Zoho Books, Zoho Daybook, QuickFile, Sage Business Cloud Accounting, MYOB, QuickBooks Desktop Pro, QuickBooks Online Advanced and Sage 50cloud Accounting.
Some top alternatives to Nusii includes PandaDoc, Offorte, Proposify, Better Proposals, Proposable, Propoze, ProposalPad, Fresh Proposals, Prospero and Proposa.