MilkDrop - 3D audio visualization plugin, compatible with WinAmp plugin API
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
projectM - projectM is an LGPL'ed reimplementation of Milkdrop under OpenGL.
Chatlio - When you have a business to run, your average instant messaging software just will not do. You need an internal presence upon which your entire team can collaborate on. Read more about Chatlio.
Magic Music Visuals - Fully-customizable and highly responsive visuals for live and recorded audio & MIDI.
LiveChat - LiveChat - premium live chat software. Approach customers directly on the website, make connections and drive more sales using LiveChat.