iPod Touch questions

What are some free apps to get for an iPod Touch 4th Gen ? I have the usual suspects for social networking (including Netflix, Skype & Remote for Apple TV)
I would like to get What’sApp, however, it’s unavailable lately for iPod touch :confused:

Is it worth Jail breaking iOS devices? I found that trying to break my ATV2 & iPod touch is more trouble than it’s worth in the end…

thoughts on apps and to break or not Jail Break?