NPS for B2B SaaS - NPS surveys and analytics for B2B teams
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
TinyNPS - Simple NPS feedback
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
SalesRight - Customizable interactive pricing guides for B2B SaaS sales
HelpScout - Help Scout is a simple, straightforward way to provide excellent support