Yes, both Xero and Zistemo offer a Free Trial.
Xero is designed for Freelancers, Medium Business and Small Business.
Zistemo is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
The starting price of Zistemo begins at $15/User/Month, 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 Zistemo includes Quickbase , Smartsheet, ClickUp, Zoho Projects, TimeTracker App, TimeTrack, Time Track Bill, Timesheet, Billable, Wrike, monday.com, Asana, ProjectManager.com, Quick Base, OfficeTimer and Project Insight.