System 1 Free Edition - Version 5.0 Considered as the optimal solution to office administration and invoicing. The free FreeEdition organizes your addresses - informatively and in details. Your daily routine is arranged by the integrated date administration and the so called "time boxes" - they replace notes at pin walls or monitors. i3 System 1 integrates innumerable processes in only one application - even your documents or tables are started and arranged with System 1.