XHEditor
http://segmentfault.com/blog/digwtx/1190000002439076
CKeditor
http://segmentfault.com/blog/digwtx/1190000002436865
UEditor
http://segmentfault.com/blog/digwtx/1190000002429055
使用说明： http://fex-team.github.io/ueditor/
下载：http://ueditor.baidu.com/website/download.html