Noostr is a content management system aimed squarely at social news networks. Sites like Reddit, Hacker News, and Digg are all social news aggregators, just like your Noostr site will be. People can sign in, submit news stories or ask questions, and everyone can vote for the best ones. Those top stories float to the front page and generate more traffic, more comments, and more votes.
iSPARQL is the OpenLink interactive SPARQL Query Builder, a utility for building and executing SPARQL queries. It may be used on any standard SPARQL endpoint, but can utilize the full power of Virtuoso Sponger when connected to a Virtuoso endpoint. The queries, together with various parameters, may be saved in a WebDAV-capable file server.