One of my hobbies is playing tabletop role-playing games. These are games (the most famous is Dungeons and Dragons) that are played with a gamebook (optional if you're not the game master, who creates the plot, locations, and every character you meet), dice, and a pen and paper to write out your character's attributes.
Although the game itself exists only in player's heads, the accessories are http://io9.com/the-best-digital-tools-for-organizing-your-rpg-campaign-662858962: gamebooks, character sheets, maps, advice from other players - you can even roll dice with an app.
Since I got my iPad Mini 2 years ago, I have given up paper character sheets for editable .pdfs. Since you change your sheet whenever you level up, add a skill or get injured, they tend to get messy after a while. I also use .pdf gamebooks exclusively.
For this thing, I decided to get a little more advanced and try Gamers' Toolkit, a game management system. I play a fairly obscure cyberpunk game called Interface Zero, using the Savage Worlds system, but Gamer's Toolkit supports it. I did have to pay $1.99 for the Savage Worlds expansion pack - the app itself is free and includes character sheets maps. tokens and dice rolling for the latest version of the ever-popular Dungeons & Dragons.
I had a little trouble figuring out how to maneuver the drop-down menus for the character sheet, but once I did it was pretty easy. You can add a photo from your camera roll to really personalize it, although I wish it was integrated with file-sharing apps like Google Drive and Dropbox. As you can see above, the result is very clean and neat, and when I level up, it will be easy to change. The app did crash once.
I took a look at RPG Toolkit Lite as well, but it didn't have character sheets, although being able to shuffle virtual cards is pretty cool. Everything else was specific to a given game I don't play.
All in all, I would recommend Gamers' Toolkit to gamers who play a compatible game. It could also be used if we hosted a game at the library for creating pre-made characters (this makes it easier for people trying out their first role-playing game to jump right in). I still prefer to roll real dice, though.