Bitrix24 is collaborative workspace for companies. It hosts features that support businesses’ CRM, planning, and project management needs. The workspace includes a public frontpage feed for company-wide dialogue, as well as conversation modules for smaller group meetings. Other modules allow users to keep track of client data, project progress, and building reports. The Bitrix API allows developers to upload client information by exposing the CRM functionality. It is a RESTful API that returns JSON-formatted data.
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There are no source code libraries or how-to links for Bitrix24. If you know one why not add it?
After reading a review on Bitrix24 <a href="http://www.softwareforenterprise.us/2012/06/10/free-web-based-intranet-portal-with-crm-project-management/">here</a>, I've decided to give this free intranet portal a try.
It's really suitable for my small business because it has many functions such as team collaboration, document management and more for my team of 10 employees to work on.