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.
The downside, I think the lack of registration, but you can add manually.