iPad PDF Tools
· iBooks is a native iPad app and can open PDF files and read them but you cannot annotate PDF files with iBooks. Also note that if you open a PDF file with iBooks it will appear in your bookshelf in a separate PDF section. You may or may not like this.
· GoodReader $5.99. The reason many of us are willing to pay $5.99 for GoodReader is that GoodReader was the first very popular PDF reading tool on the iPad, it is cheap, and it still works very well even with large documents. For the money, GoodReader it is an excellent tool to have handy in case some other PDF reader tool does not work right.
· GoodNotes $3.99. I actually own this one as well as GoodReader and I love the way it allows me to takes notes in meetings. I don’t use it to mark up PDFs much but the ability to magnify the note taking area for general notes makes this a very good tool as well.
· Adobe Reader (free and the current version will also allow you to sign a PDF document)
· Evernote (free and premium edition)
· PDF Pen $14.99
· iAnnotate PDF $9.99.
· Quickoffice Pro HD $19.99
· CloudOn (free used mainly to open Microsoft Office documents not just PDF)
· Dropbox (or your data sync tool of choice)