Need free online collaboration software and tools? Take a look at Bitrix24 - the fastest growing web based collaboration
software that is 100% free for up to 12 users and includes over 30 tools that your team can start using in 30 seconds. Academic collaboration, business collaboration,
volunteer coordination, social intranet for non-profits - Bitrix24 can help make your team more productive. Learn more
Please read Bitrix24 manual, if you'd like to know
how different collaboration work. And if you want to buy on premise editions of Bitrix24 that come with API, CMS and source code, please
download trial version here.