All this is in the previously mentioned
www.fengoffice.com/Free (Free Trial may not obrisati attention)/
— There are schedules, and task assignments, inside and outside the company.
— Responsible as people and departments.
— There are comments and attache.
Notifications by e-mail as ending the period, and about the new appointment.
— Rights
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The downside, I think the lack of registration, but you can add manually.