I find OurFamilyWizard to be an excellent tool/website for co-parenting experience for separated and divorced parents. It's easy to use, has many great features such as messaging (with time-stamped read confirmation), calendars, reminders, file-sharing section, school and other useful items/tools. This way better than e-mails or text messaging, and will avoid "I didn't get it in time" or "It got lost in the midst of all" -- Highly recommended. Thank you.
Resources from Canada.