Hubz are general-purpose websites built with Hubzilla. Every website member can create their own unique website or social space, and these can all share and interact.
Hubz all over the internet "magically" connect together to create very large social networks, websites, and communities; and these can all share and interact.
Members of my Hubz can easily and securely share stuff with members of your Hubz. Anything with anybody. Publicly, or privately.
Hubzilla is open source and built on PHP/MySQL/Apache (Mariadb or Postgres and Nginx could also be used, we're pretty easy).
Hubz are
decentralised
social
privacy-enabled (privacy exclusions work across the entire internet to any registered identity on any compatible Hubz)
optionally inter-networked with other hubs
Possible website applications include
decentralised social networking
personal cloud storage
managing organisational communications and activities
small business websites
public and private media/file management and access
blogs
event promotion
feed aggregation and republishing
forums
pretty much anything you can do on a traditional blog or community website, but that you could do better if you could easily connect it with other websites.
Hubzilla members can also interact to varying degrees with several independant social networks such as Diaspora, Redmatrix, and Friendica; and can cross-post published items to a large number of other social and communication providers via plugins.