Markup is the easiest way to annotate documents on the iPad.

Markup is a game-changer for teachers, who can now use their iPads to grade assignments, and not have to deal with stacks of papers on their desks.

And Markup isn't just for teachers to use as a essay, paper, or homework grader. Lawyers who review contracts, writers who edit manuscripts, contractors who mark up blueprints - virtually anyone can use Markup to "go paperless."

Markup's killer feature is Email Sync, which assigns each user a unique email address. Every document sent to this email address is automatically imported into the Markup app. This way, teachers can simply ask their students to send their assignments to the teacher's Sync email. No need to waste class time printing, collecting and handing out assignments.

Markup supports a ton of filetypes through Email Sync, including PDF, DOC (Word documents), RFT, TXT, JPG, PNG, TIFF, PPT (Powerpoint presentations), CSV, XLS (Excel spreadsheets).

And if you don't want to use Email Sync, no worries - you can still open documents from your iPad with Markup, using the "Open in app" functionality for annotation. This works with Dropbox, Google Drive (formerly Google Docs), Mail, Safari, Gmail, Chrome, Goodreader, iBooks, etc.

Markup is brought to you by the creators of ShowMe Interactive Whiteboard, one of the most popular iPad apps for education.

Questions/feedback? Email us anytime at support@showme.com