1. Clash of Clans - very addicting online village tycoon game. You build up your village and defences and attack other real people's villages to attempt to steal their money, but beware other people can attack you too.
2. ProCreate - the best art app on the market, only for iPad. Supports pressure-sensitive stylus' via bluetooth, smooth lag-free brushstrokes, powerful resolution and layering system, hd brushes and custom brushes
3. Graalonline Classic - duh
4. Graalonline Zone - eh
5. Graalonline Era - meh.
Those are the only apps I ever play