From Chat Essentials:
A Web-based Text/Voice chat with: GlassBut Technology, Database connectivity, User privileges, Web-based remote management, Chatwatch, Flood control, IP banning, Graphical icons, Skinnable GUI, Private client-to-client voice chat, Public voice chat, Password protected chat rooms. Hands-free voice chat. Private and public push URL. Private and public file transfer. Chat transcript. User registration system. Optimized and powerful chat engine. HTTP-tunneled connections. Install-free secure client (Java Applet). Easy to install, multiplatform engine (Java Servlet).