I have heard so many great things about Our Family Wizard ($100/year and up), a website and app that is designed to help families easily manage all of the intricate details that accompany shared parenting. The website features a shared calendar where parents can request modifications to custody schedules as needed — this is great in families like mine, who are juggling three (or more) sports schedules each season! There is also a section to track child-related finances. Our Family Wizard is particularly useful for those in high-conflict divorce, and if it prevents even just one argument in front of the kids, then it's worth every penny.