I thought about this while discussing Wizard101 with a real-life friend just yesterday.
A mobile companion app.
Specifically, an app where you can log into your Wizard101 account on your phone, access your bank, gear, and inventories across all your Wizards on a single account. You can move items between characters, manage your backpack, craft with reagents you have, and quick-sell from the app. I'm mostly recommending this because I play with a number of real-life friends, and when we get to talking about stats, I can never remember what I use and/or have. This could also help with pet management, and such an app could also work in Pirate101 for the same things, and their style of pet training (Idle).
Other apps do very similar things. Namely, Destiny and Warframe come to mind. I use the Warframe app a lot when I'm not at my computer, especially when I'm in dire need of crafting resources.