Camera+ with it's new iOS 7 filters and now new burst mode. Personally when the name of the filter is associated with something such as 'so emo' or 'purple haze' you can't help but be attracted to it. With the added features, you can view before slapping on that filter. And in the moment of action having a burst mode...a life saver. Helpful doesn't even cover it, so in terms, this because a life saver.
Family photos, once we come across an old scrap book, we want to save those memories. And by saving them, I mean scanning them onto our laptops. Sadly with dust and scratches, you just want to preserve them as long as you can. I found using the 'clone tool' will become a close friend. Clean up those family photos, and have patience. The amount of time you may spend on staring at the same image of your mother-in-law, in that bright neon 80's dress...may displease you to some extent. Learn to have fun restoring some events that may led to side spilting laughter or tears.
IPhoto is free, which means in the first paragraph of reading about how you could spend half of your mac money on a software. Unless you know about iPhoto and let's hope you do. This software also has a retouching tool, for those digital noise complaints (as a concert photographer...that break from the IOS to the noise in the photo can be degrading) until you retouch it to look slick as spick and spam. Another tool that's helpful is the editing, where you can take one image and another to as a side by side edit. If you want to replicate the same contrast in one mountain view to another...boy oh boy, you've found your treasure in this one.