Delta60 Accounting Software - Version 6.0 Delta60 has a new World version and a new graphical user interface. Delta60 is an integrated Accounting Software Package that includes: A/R, A/P, Invoicing, Partracr Inventory 6.0, Paymastr Payroll 2.0 and General Ledger. Delta60 emphasizes strong reporting and with the new interface is faster and easier to use. The World version adds flexibility for international users with 5 open fields for addresses and 5 open fields for invoice item tax percents.