http://eclipse-tools.sourceforge.net/updates/ 查找接口的实现类
http://quantum.sourceforge.net/update-site  数据库客户端
http://www.bastian-bergerhoff.com/eclipse/features  QucikRex
http://www.polarion.org/projects/subversive/download/eclipse/2.0/update-site/
Subversive 客户端