Early Christian Writings is an amazingly complete collection of New Testament, Apocrypha, Gnostics, and Church Father writings. The site is not searchable but can be browsed.

BrainMaps is an online brain atlas that features scanned images of brain sections. You can search by keyword, browse the top searches, view the scans by species, or learn the terminology.

Recipes Today is a site that specializes in healthy food for families. They offer food and nutrition news, recipes, articles on cuisines, parties, and cooking, and much more.

Musipedia is an online music encyclopedia that has several fascinating services. You can search for a song by humming, click on the keyboard to type in a melody, add a new melody of your own, and join the discussion boards.

Wink is a social search engine that searches through people’s tags to allow you to find the top entries for a given search term. You can search without joining the community, or join for free and be able to import your del.icio.us bookmarks and tags. They have featured collections of links that everyone can participate in. This is a slightly different service than other tagging and social sites I have seen.

PropSmart is a search engine for real estate that lets you do a quick search by location, MLS number or PLS number.  Then you results are displayed as a list and accompanied by a map.  This site is easy to use and offers different listings than some of the other large realty sites. 

Newsvine is a site that combines tagging with news coverage.  The site has news from the World, the U.S., sports, politics, technology, entertainment, science, business, and health.  You can comment on each story, add your own personal tags, subscribe to their feeds, or use Newsvine to add news to your blog. 

RSS 2 PDF lets you create pdf files from RSS feeds, Atom feeds or OPML files.  You can either show the images or choose not to.  It is a slick way to create handouts, files for your website or other documents that will let you introduce your blog or RSS feeds to others.

The Supreme Court Zeitgeist is a mashup that covers the Supreme Court.  It draws links from Google News, del.icio.us and Technorati.  So you get news, tags, and blogs all in one place. 

Wayfaring is a mapping site that lets you make your own personalized maps with destinations marked, share the maps, and look at maps created by others.  You can also connect with others and create a map together.