DISQUS - Disqus is a global comment system that improves discussion on websites and connects conversations across the web.
Infinite Campus - Access your (or your child's) schedule, grades, assignments and attendance data using the...
IntenseDebate - IntenseDebate's comment system enhances and encourages conversation on your blog or website.
Gradelink - Gradelink is a one-stop-shop system for K-12 schools. You can see grades, attendance, tuition, admissions and communication in one place.
Commentbox - Commentbox is a jsf component that allows quick realization of a comment functionality
QuickSchools - Fully online school management system. FREE 30-day trial. Sign up in 60 seconds. Track attendance, homework, gradebook, report cards, scheduler, parent portal and more!