No7:ICQ

Which once was the most popular instant messenger software.The cruel compition is one of the reason that ICQ  is forgotten.But i think the most important element is language problem.Maybe ICQ is too welcomed in the world,maybe the master of ICQ think childishly people all over the world can speak and know english.English is the only language is operated,but there are so many people who dont speak english as their main language are using ICQ.

NO6:Coolstreaming

Coolstreaming is a software which is used in  p2p.It is forced to close by political reason for a period of time,but there is no its market when it open again.

NO5:SuperJieba

There are so many rascal software binded to Jieba.

NO4:NJStar

Binding and monopolization lead the NJStar to dead.

NO3:NetAnts

NetAnts users can not manage their downloaded file efficiently and expediently.Another reason is that netants occupies too much system resource when its run.

NO2:Napster

Nobody can breach the law,so do a software.

NO1:Netscape

Binding leads a main cause again.Microsoft takes a great advantage in this war.I think IE will be the main broswer as long as you use MS OS.