UseResponse - Open-source, self-hosted customer feedback software, live chat and helpdesk system that you can install on your server. Organize documentation using knowledge base and get feedback from social networks with centralized system
BlueScreenView - Displays information about blue screen crashes occured on your system. (MiniDump Reader)
Doorbell.io - Collect in-app user feedback. Available on websites, iOS, and Android.
WhoCrashed - WhoCrashed reveals the drivers responsible for crashing your computer.
UserVoice - UserVoice integrates easy-to-use feedback, helpdesk, and knowledge base management tools in one platform that empowers users to speak and companies to understand.
WhatIsHang - Get information about hanging/freezing (stopped responding) Windows program.