Jaco - Watch and analyze your users’ behavior
Interactive NPS Calculator (by Delighted) - Calculate your NPS easily with this interactive free tool.
Ahoy Ruby Gem - Analytics for Rails. Track visits and events in Ruby, JavaScript, and native apps. Data is stored in your database by default so you can easily combine it with other data.
TinyNPS - Simple NPS feedback
Plumb5 - Plumb5 is a real-time end-to-end customer centric digital analytical & marketing automation utility system helping marketers to generate more leads using automated tools.
NPS for B2B SaaS - NPS surveys and analytics for B2B teams