DISQUS - Disqus is a global comment system that improves discussion on websites and connects conversations across the web.
AccessE11 - Easy to use and quick to implement. AccessE11 empowers municipal staff to address their citizen’s concerns simply and efficiently. Contact us today for a demo.
Commentbox - Commentbox is a jsf component that allows quick realization of a comment functionality
Intelligov - Gov Tech
Juvia - A commenting server similar to Disqus and IntenseDebate
eMunicipality - Gov Tech