CloudOn (acquired by Dropbox)

CloudOn's 9 million users, the driving force behind CloudOn, have created, edited or shared over 90 million documents making it a top 10 productivity app in 120 countries. CloudOn has joined Dropbox. We’re thrilled to continue building things that help people work better – and we’re proud and excited to join the Dropbox team to help people be more productive every day. Read more here: http://www.cloudon.com