Asklayer - Get real answers from your customers with Asklayers surveys, quizzes, polls and more. Works on any website with zero code and includes enterprise level features such auto-segmentation, user tagging, branching, NPS & CSAT calculation.

MilkDrop - 3D audio visualization plugin, compatible with WinAmp plugin API

Ask User - User surveys without stress

projectM - projectM is an LGPL'ed reimplementation of Milkdrop under OpenGL.

buddybuild - Buddybuild ties together continuous integration, continuous delivery and an iterative feedback solution into a single, seamless system. With buddybuild, you can focus on what matters most: creating awesome apps.

Magic Music Visuals - Fully-customizable and highly responsive visuals for live and recorded audio & MIDI.