Being a DM, there's a -lot- to keep track of. NPCs, monsters, initiative, your notes, maps, and on and on. It can be rough to try and keep it all organized. But that's where the Tome of Summoning comes in. It's got a little bit of everything to make sure that your games run as smoothly as possible. The campaign is up on Kickstarter now.
From the campaign:
The campaign's over 5x funded with 25 days left to go.