Good old Wikipedia, great new look

PLoS Medicine is an open-access, peer-reviewed medical journal that publishes outstanding human studies that substantially enhance the understanding o...

MBA智库百科，专注于经济管理领域知识的创建与分享。包括企业管理、市场营销、管理咨询、人力资源、战略管理、MBA案例、财务会计、广告、品牌、经济、金融、法律、博弈论、证券、股票以及公司企业、商学院、经管人物等介绍。

百度百科是一部内容开放、自由的网络百科全书，旨在创造一个涵盖所有领域知识、服务所有互联网用户的中文知识性百科全书。 在这里你可以参与词条编辑，分享贡献你的知识。

Twitter is without a doubt the best way to share and discover what is happening right now.

人人网 校内是一个真实的社交网络，联络你和你周围的朋友。 加入人人网校内你可以:联络朋友，了解他们的最新动态；和朋友分享相片、音乐和电影；找到老同学，结识新朋友；用照片和日志记录生活,展示自我。

Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with fr...

codeBeamer is the award winning Collaborative Application Lifecycle Management (ALM) solution for distributed software development. It provides projec...

The premier measurement company -- advancing electronics, communications, life sciences and chemical analysis

Translation-Dictionary offers free online dictionary and free translation services for many languages. i.e. English-French translation and English-Chi...