If you are looking for best free CRM software for Mac or PC you'll love Bitrix24. First, no download is necessary, though we do have on premise version written in PHP that you can install on your server which gives you access to source code, if you need it. Second, Bitrix24 is free CRM software with Android app and iOS app support so that you can work with your CRM from iPhone, iPad and other mobile devices. Third, it's fully customizable - custom fields, lead stages, product catalog, CRM reports, quotes and invoices - these are all at your fingertips.
Plus Bitrix24 is the only free CRM software with VoIP telephony support as far as we know. This means you can make and receive phone calls directly inside the CRM, store phone call records and use voice mail, call transfer, call forwarding and other features that are only available in premium CRM systems.
The basic version of Bitrix24 CRM is absolutely free with unlimited CRM records for up to 12 people. Register now or check out our videos and CRM manual for a quick start.
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.