Concur (, the maker of travel and expense-report software, knows that some of its users have been unfaithful. Many have turned to free -- and simpler -- consumer-oriented sites to book business travel. So the company, based in Redmond, Wash., is taking cues from apps and websites aimed at the mainstream -- by buying them. It shelled out $120 million for )trip-planning app TripIt in 2011 and, this past November, announced a $150 million fund to invest in similar startups. Concur isn't alone. Other enterprise-software giants are racing to acquire user-friendly software in hopes of keeping customers from turning elsewhere. (One exception? Cisco (Fortune 500), which has divested itself of most of its consumer businesses.) Here are some bellwether acquisitions. ,
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