Please check out our qPDF Notes! We're only asking $9.99, and you can try it for free. The demo version fully works, though it shows a watermark that will also be on the files you might save. Users seem to like the ability to annotate and save as standard PDF, so the annotated file can also be read in other PDF viewers. As I'm new to this forum, I can't include a link, but can tell you Qoppa dot com is our website, and the apps (both the annotation app which also fills forms and our free PDF viewer qPDF Viewer) are readily available on the Android Market.