Elgg is a framework for creating web applications with a focus on social networks. The open source software is adaptable to fit your needs and has been continuously developed since it was founded in 2004. Both a core development team and a large community are involved in this development process. In addition, numerous plugins ensure that the functions can be adapted individually. Today, several large companies and universities are among the users of Elgg.
If you use the sms77 plugin, you can also send SMS in Elgg and thus expand your communication with a strong partner.