If you are looking for the best free account management software that goes beyond basic CRM, Bitrix24 is it. Sure, at first glance Bitrix24 is just an extremely powerful free CRM, but let us dig deeper. With intelligent call routing, client calling the company get automatically connected to their dedicated account manager. Need to have customer portal where clients, managers and other parties can interact with each other in real time? Bitrix24 extranet is at your disposal. Quotes and invoices? Of course Bitrix24 has those. Tasks, projects and accurate time tracking that helps your account managers easily bill clients for work done are at your disposal as well.
Bitrix24 CRM manual is available here.
If you are interested in buying self-hosted editions of Bitrix24, which come with API, CMS and source code, can be easily customized and integrated with other tools, please download a trial version here.