Roper Technologies has acquired OnCenter Software. OnCenter was at least partially owned by Accel-KKR, which made an investment of unknown size in October 2013. OnCenter, in business since 1998, markets estimating and project management software. It integrates with a number of packages including Sage 300 Construction and Real Estate. It also links with Cert-In Software Systems, Roger Shaw & Associates, and Prime Estimating Software and Services.