SentriLock, a maker of electronic lockbox systems, and Showing Suite, makers of Homefeedback.com, have integrated their systems to better serve their mutual residential real estate customers. Under the agreement, SentriLock will have access to a free version of homefeedback.com, a home-showing software product. The intregated systems allow users to manage showings, feedback and contacts. Homefeedback.com system saves hours over the course of a home listing by gathering feedback and managing lockbox showing information, the two companies said. Features include the ability to add a showing portal to Realtors’ websites. Rick Bengson, CEO of Showing Suite, said the firm is also adding mobile applications. “You will be able to look up all of your showing information and call, text, or e-mail any of your showing contacts, view feedback, or e-Blast price reductions right from your iPhone, Droid or BlackBerry.” Scott Fisher, CEO of SentriLock, said the integration will allow residential real estate agents and brokers to be more effective. “We are always trying to provide our users with tools to allow them to be efficient in their work, and this partnership is just another item on that list,” he said. Write to Kerry Curry.