I maintain a whole set of services for my family I either implemented myself completely or glued from other sources.

We have our own no nonsense chat desktop, web and mobile apps for ios and android. Our own calendar for family events as well as to coordinate daily operations. Our own forum. Our own pages with resources and even our own documentation bot that you can ask pretty ambiguous questions and it can point you to the past posts/documents/chat threads that are relevant (when you don't remember where it was mentioned but you can describe what you are looking for).

Even a wall mounted ipad with couple tools that we find useful. Shopping list where you can add stuff for the next shopping run. Voting for meals. Calendar which is especially useful to kids because they can book our time when they need something or they can see when I plan to do my training sessions or when I am or I am not available (I work remotely and don't have set day plan).

Recently started spending time with my eldest son to add more features -- any way to get kids hooked up to programming is a win IMO.