if you are not capturing web pages then Evernote or one of its competitors is probably a good choice. I tried using Evenote and some other apps and (as of a year ago, anyway) they didn't capture what web pages looked like very accurately. Since most of the stuff I want to capture is web pages and not pdf this was a problem.
I'd recommend trying Evernote again for web capture. They've improved it dramatically in the past year.