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.
Salsa is a Web application for authoring higher education syllabi called SALSAs (Styled & Accessible Learning Service Agreements). SALSAs promote learner-centric and accessible formatting, well-defined learning outcomes/objectives, and inclusion of required policies: accommodations for students with disabilities, academic honesty, course evaluations, etc. Salsa generates a unique and random hyperlink for you. Use the hyperlink to return and edit your SALSA, or publish your SALSA to generate a new hyperlink to a "read-only" copy of your SALSA in PDF or HTML format. No email address or signup is required.
Refinery is a Ruby on Rails content management system for small business sites where the client needs to be able to update their Web site themselves without being bombarded with anything too complicated. It is truly aimed at the end user, making it easy for them to pick up and make changes themselves.