Sequreisp is an ISP management software. It has a nice and powerful Web interface, and it can handle up to 3000 or more clients in a single server, thus it is oriented to small/medium ISPs and WISPs. It features load balancing, failover, prioritization, bandwidth control, P2P detection, Web cache, backup in a single file, VLAN support, and much more.
Noosfero is a Web platform for social networks. Besides the regular social network features (such as friends and communities), Noosfero offers a full-featured CMS, making every user or community profile a complete Web site with several types of content (including text, image gallery, and file uploads), RSS feeds, agenda, the possibility to set custom themes, and other features. It is also possible to run several independent social networks within the same Noosfero installation.