MagicalPad for the iPad
I have been using this app for a while now and it has only been getting better with updates and bug fixes. The example in the picture is a dungeon I ran back in October. As you can see, I can keep track of rooms, what is in them, and any details I need to quickly reference. Color coding and text formatting allow me to mark combat, traps, special areas, and NPCs clearly. You can use this for other tasks as well. For example, one of my players has the same app and instead of reading loot from a list and waiting for them to write it down, I can share loot lists through google drive, Dropbox, Evernote, or email. As a player, I keep track of NPCs, loot, locations, and plot points. My GM is a little impressed at how I am on top of things, but possibly annoyed that I have “remembered” everything.
Using the app is simple and easy to learn. Most of the functions are done by pressing buttons, but there are also tapping and keyboard functions that make everything quick and easy.
Check it out, and let me know what apps you use in your games.