Featurebase - The all-in-one toolkit for managing your customer feedback.
Doran - Doran is a platform to collect customer feedback with product roadmap and changelog tools.
Nolt - A fast & beautiful way to collect user feedback
Feature Monkey - The feedback tracker for building better features
FeedBear - The smartest way to manage feedback from your customers
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