This is the Software Publisher's description.
With GoodReader on your iPad, you can read virtually anything, anywhere: books, movies, maps, pictures. Use it once and you’ll be hooked. Soon you'll be wondering how you ever managed to use your iPad without GoodReader.
Annotation is a feature long sought after by users who want to add their own mark-ups to PDFs, especially those collaborating as a team on shared documents. The types of annotations that can be created and edited in GoodReader include typewriter text boxes, popup comments ("sticky notes"), text highlights, freehand drawings, lines, arrows, rectangles, ovals, cloudy shapes, text underlines, strikeouts, text insertion marks.
GoodReader lets you create folders, move, copy and rename your files; zip, email, unzip and unrar them; plus send your files to other apps.
Transfer files in a number of ways: directly from your computer over a USB cable or WiFi connection, from the Internet or from email attachments. It also easily integrates with iDisk, Google Docs, Dropbox, SugarSync, box.net and other WebDAV, AFP, FTP and SFTP servers.
With no bars or buttons blocking the text, you’ll experience true full-screen reading. Do your document’s pictures split in halves across two pages? That’s not a problem with GoodReader – one of the only apps to offer a special double-page mode for viewing the entire spread! And if large page margins are annoying, get rid of them with GoodReader’s special PDF crop tool!