Third Voice

Third Voice was a web annotation browser plug-in launched in 1999 by a company of the same name.[2] The motto associated with the plug-in was:Your Web. Your Voice..[1] The plug-in allowed users to use a sidebar to annotate web sites with note and view notes left by other users.[3] A small red triangle indicated an annotation had been left by another party, these annotations not being held on the website itself but on Third Voice's own servers. https://en.wikipedia.org/wiki/Third_Voice