DISQUS - Disqus is a global comment system that improves discussion on websites and connects conversations across the web.
Sup! Standup Bot - The complete stand-up and follow-up bot
IntenseDebate - IntenseDebate's comment system enhances and encourages conversation on your blog or website.
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
Commentbox - Commentbox is a jsf component that allows quick realization of a comment functionality
Hive - Seamless project management and collaboration for your team.