Social Mention

Social Mention gives real time results from social media sites such as Twitter, Facebook, FriendFeed, YouTube, and about 100 more sources. SocialMention offers bar graphs that show the top keywords, top users, top hashtags, and sources. The results are also sliced and diced into “buckets” that critique the messages for strength, sentiment, passion, and reach (FreePint Newsletter No.365, 2012)
http://www.socialmention.com/

BMC Cases Database

BMC Cases Database is a valuable new resource from BMC. Cases Database, a continuously-updated, freely-accessible database of over 10 000 medical case reports from multiple publishers, including Springer, BMJ and PubMed Central.

By aggregating case reports together and facilitating comparison, Cases Database provides clinicians, researchers, regulators and patients a simple resource to explore content, and identify emerging trends (from the website)

http://www.casesdatabase.com/

BioMedSearch

BioMedSearch is a biomedical search engine that contains NIH/PubMed documents, a large collection of theses, dissertations, and other proprietary publications not found anywhere else for free, making it one of the most comprehensive and powerful free biomedical searches.
BioMedSearch also provides advanced account features that allow saved searches, alerts, saving documents to portfolios, commenting on documents and portfolios, and sharing documents with other registered users. Registering for BioMedSearch is free.
The link is http://bmlsearch.com/?&kwr=&ck=&cxts=10&fntszff=100&hghlght=maroon&srtrdr=relevance&annttn=none&pdthm=2010&hqryhstry=67ebaaa19d546c3656049267c732940c&pgwdth=100&mld=&wft=wims&b4s=914007886&flnm2=bmlhome.html&ifjs=ys