DISQUS - Disqus is a global comment system that improves discussion on websites and connects conversations across the web.
Jason - Infinitely hackable mobile client
IntenseDebate - IntenseDebate's comment system enhances and encourages conversation on your blog or website.
Kamon.io - Kamon makes an instrumentation library and Application Performance Monitoring tool that helps developers find and fix performance issues in microservices. Works best for Scala (Akka, Play, Lagom) and Java.
Viafoura - Viafoura is an easy-to-integrate social monetization platform that enables your to better engage, understand and monetize your community.
WorkForce Software - WorkForce Software provides workforce management solutions for organizations with complex policies and compliance concerns.