Front, a San Francisco-based maker of email collaboration software, raised $59 million in Series C funding led by a group of top executives from enterprise software companies Atlassian, Qualtrics and Zoom. Why it matters: Its not common for individuals to lead such a large round, but Front thinks that it will gain insights from executives who have had success in changing the way people work. Go deeper: Tomorrows workplace apps are pretty, cloud-based and collaborative