[Bilski]

Our chapter uses Google Calendar to keep track of the schedule. You can even save it in easy to read weekly formats and email that out to the whole chapter at the start of the week if you like.

Also, we use tatango.com to send mass text messages about event changes and reminders.

As for a contact database, Excel works fine, or you could create a Google Spreadsheet and link a form to it so that alumni and actives can update it themselves.