If you are looking for #1 free sales and account management software, Bitrix24 is it. Making your first sale is easy. Keeping your customer happy for life is hard. Bitrix24 is here to help.
Most sales and account management software come with the same set of features - client management, billing, product catalog, email marketing, appointment setting, tasks, projects, billable hours, recurring invoices, birthday reminders and so on. Bitrix24 has those features, too, but it also gives you a number of account management features that aren't available inside other CRM software.
For example, intelligent routing automatically connects clients to their dedicated account managers when they call you or contact you via email. You can also create customer portal (extranet workgroup) or dedicated live support channel. A number of real time communication tools Bitrix24 offers is substantial - automatic call back, video conferencing, group chat, visit tracker, and even face recognition that helps your employees instantly recognize an existing client regardless of which office or location they are visiting.
Bitrix24 is available in cloud, on premise with open source PHP code assess, and as Android and iOS apps.
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.