Programs in aion are much like mods but actually interact with the game. The first one might be showing all the levels and names of every players in the game. This even includes showing the level of the opposing teams in the game. This can give you a giant advantage over other players.
Another thing that programs include are offsets. These are used by bot creators and hack creators to make things. Most people need a specific aion program to help them find offsets. Aion offsets are all the things in the game in a code format. So there is a specific offset for your characters health. With that you can create bots. These offsets allow players to change the entire dynamic of the game once they have them all.
For premium aion programs be sure to check out the forums.