YouTube is a place to discover, watch, upload and share videos.

LinkedIn strengthens and extends your existing network of trusted contacts. LinkedIn is a networking tool that helps you discover inside connections t...

Listen to any song in the world for free. Create free internet radio stations. Search for free mp3

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...

Facebook 是一个联系朋友的社交工具。大家可以通过它和朋友、同事、同学以及周围的人保持互动交流，分享无限上传的图片与转贴链接，更可以增进对朋友的了解。

foursquare

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

TripAdvisor - Unbiased hotel reviews, photos and travel advice for hotels and vacations - Compare prices with just one click.

The largest and most trusted free online thesaurus. Quickly find accurate and up-to-date synonyms, antonyms, and related words at Thesaurus.com. Synon...