DotLoop is a popular cloud collaboration platform launched in 2008 and created especially for real estate professional. It's extremely easy to use and features many tools that agents use on a daily basis. The only large part that's currently missing from DotLoop is CRM and Email marketing. If you are looking for a free DotLoop alternative that is industry independent or need a free real estate CRM, take a closer look at Bitrix24.
* Please note that the information may have changed since the publication. For current prices and features please visit Bitrix24 pricing page.