TrackDuck - Visual feedback for web design and development.
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.
TigerTalk - Seamlessly get feedback on your video presentations
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
Frame.io for iOS - Real-time video collaboration, now with a native iOS app
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.