What's a good PDF score reading app for iPad?
forScore

This is the app I use--it's extremely stable and has a fantastic feature set. Only $5, too. What initially drew me to it was how easy it is to get files into the app--you can download them from a URL, from your Dropbox, upload from iTunes, use a built-in store, take a picture of a physical score with your iPad's camera... There's also a neat feature to share scores with other iPads over Bluetooth--something I've on occasion done with my piano teacher.

I don't even use all of the many features, but it's an app designed specifically for PDF sheet music reading and performance, so here are some I know off the top of my head:


Lots of options for metadata, categorizing, and bookmarking exist.
Annotations are built-in and very easy to use.
It's got a handy "performance mode" that disables extra functions except for the page turns.
It can even make use of a Bluetooth foot switch accessory for page turning.
You can rearrange/duplicate/crop the pages of your PDF so you have a linear set of page turns to deal with cuts, repeats, and codas.
You can bind page turns to an audio track for rehearsal or performance purposes.
Built-in metronome and pitch pipe for rehearsal purposes.