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

Forms Manager - Forms Manager is an online form of automation software that helps businesses build forms, manage workflows, and analyze real-time reports.

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.

ginstr - ginstr is a business software that lets user create custom form-based apps for customers or employees to download, fill out, sign and return from any web device.

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.

Launchcloud - Data collection & automation made simple.