Sexy Vibes
No, I'm kidding.
Instagram, Tumblr, Pinterest, Twitter.
Penzu, a journaling app.
Gifboom, Kik, Snapchat, Camera360.
PINK Nation, if you like Victoria's Secret.
Games...I don't really play games. But Top Girl looks like a girly game. Or Make-Up Girls? Or Star Girl.
Doodle God. I like that game, though not many other people seem to.
My Little Pony? Fruit Ninja? Cupcake Maker...
I'm not sure how old you are, so I don't know which games you'd be interested in.
Just open the App Store, tap Apps, then tap Games, then swipe left twice to get to Top Free.
From there, just browse through the games, download ones that look cool, and try them out.