Once again, Techtopia returned to the NECA Conference and Trade Show, bringing with it a variety of tech-related topics. Monday featured an assortment of 20-minute-long sessions that highlighted the latest and greatest apps, ranging from LinkedIn to Building Information Modeling (BIM). EC&M’s Director of Content Mike Eby sat in on the session “15 Must-Have Productivity Apps,” presented by Tess Vismale, tech evangelist with DAHLIA+, a Boston-based tech and marketing consulting company. Check out the nine apps Mike thought you might find most helpful.