SNS系统：Noosfero

13年前
Noosfero是一个采用Ruby开发的Web社交网络系统SNS。提供日志，个人主页，CMS，RSS，专题讨论，活动议程,团队协作，与好友即时聊天等功能。此外还支持自定义皮肤。
主页：http://noosfero.org/
以下是采用这个系统搭建的网站：

Social Networks running Noosfero

SoftwareLivre.org: the network for integration and information for the Brazilian free software comunity.

CIRANDAS: network for integration, articulation and information of Solidarity Economy actors in Brazil.

Zen3: a communication network through web and e-mail "intercommunitary".

Unifreire: network compring freirian people and institutions from various contries, including the Paulo Freire Institutes.