Eureka Surveys - Survey over 1 million people within minutes
VWO On-page Surveys - On-page pop-up surveys that reveal insights from visitors.
Iterate - Get the feedback you need to build better products
FreeSurveyCreator - With free survey creator you can embed a survey in your site and start receiving visitor feedback in no time. It is free and easy to setup
Slack Surveys by Standuply - A simple, powerful bot for recurring surveys on Slack 📝
SurveyCount - Make and distribute surveys