Appsumo, the daily deal site for software, has launched a sweepstakes offering 10 free Dropbox Pro accounts for life.  The pro account, valued at $99 a year, includes 50GB of Dropbox cloud storage and the ability to access your files from anywhere and share them with others. Visit Appsumo to read the contest rules and enter for a chance to win the sweepstakes, which ends on October 13. Read more about Dropbox on Inc.com.