Neddick is part of the Fogcutter suite of tools for building intelligent applications. Neddick provides tools for tagging, ranking, discussing, and discovering various sources of knowledge: Web-links, documents, people, etc. It's over-simplifying a little bit, but think of Neddick as sort of a combination of Reddit, Delicious, and Planet. It also includes a powerful search engine and a recommendations engine, and it lets you categorize, rate, tag, filter, discuss, and discover knowledge in ways that most enterprise search applications can't.
Social ray is a platform for professional networking. Its collaboration features include friends and communities, mailboxes, instant messaging (using AJAX), a powerful search engine, document sharing, forums, vanity URLs for users, and rich media support. Its professional networking features include resume uploads, job searching, automatic job matching, testimonials, the ability to post jobs, job referrals, and accounts for recruitment consultants.
Puggle is a desktop search engine that provides full text search over files, folders, music, photos, Web pages, and other data that are stored locally on your computer. Puggle is able to create many different indices, each with a different configuration. For example, you may have a different index for your music collection as well as your documents. Each of them can be used on demand, simply by loading it. Furthermore, Puggle supports indexing of portable devices, like USB flash drives or external hard disks. The index will be stored in the device, using relative paths, allowing you to search over the data very quickly on any computer.