Poddery
Poddery, one of the earliest diaspora social networking hosts, is a community-run distributed social-network maintained by FSCI. Apart from Diaspora, poddery.com also offers Matrix and XMPP services.
Diaspora
Diaspora is a culture. A culture against the loss of personal privacy by the corporate social network giants. Diaspora enables you to keep your data with you and provides the flexibility to choose what you share. Since your data is stored on distributed servers and not a single company's servers you are in more control of your data.
Matrix
Matrix is a decentralised instant messenger which supports end-to-end encryption and file sharing. You can connect with your friends and communities here. Matrix by default allows you to integrate with IRC and other communication medias. Riot is a client-side application with slack-like interface and markdown support.
XMPP
Poddery supports chatting among your contacts in Diaspora and anybody with an account on a service supporting XMPP. You need to enable chat on your Poddery account to make use of it. There are many free clients available for PC, tablet or mobile devices. Get one for your device from the link below.