StatCounter - StatCounter is a simple but powerful real-time web analytics service that helps you track, analyse and understand your visitors so you can make good decisions to become more successful online.
Customer Feedback Portal - Ask customers what you should build next
Histats - Start tracking your visitors in 1 minute!
Feedback Tools - Curated directory of tools for getting all the feedback
Matomo - Matomo is an open-source web analytics platform
Feedback Fish - Collect feedback & make your customers happy.