Bitrix24 is free workforce management software with a social twist. Sure it has
company directory, intranet, leave requests, absence calendar, employee profiles, company wide announcements, self service portal and
other traditional HRMS tools. But it also comes with a enterprise social network, group chats and internal videoconferencing system
that lets your employees collaborate and work more efficiently.
If you are interested in buying self hosted editions of Bitrix24, which come with API, CMS and source code, and can be easily customized
and integrated with other tools, please download trial version here.