I spent a couple of days searching for a printable tracker and didn't find any that I was really crazy about, so I made up one of my own.

It includes space to make comments each month and it comes in PINK, BLUE, GREEN, or PURPLE (all included in the one download).

Menstrual Cycle Printable Calendar/Tracker
Online Period Tracker - cute little site (free) where you set up an account and you can track your periods, set reminders (for approx days before your period or ovulation is expected). You can add notes. Based upon the dates you enter, it tells you the current day you are in of your menstrual cycle.