Nullsoft, Inc. was an American software house founded in Sedona, Arizona, in 1997 by Justin Frankel. Its products included the Winamp media player and the SHOUTcast MP3 streaming media server. In later years, their open source installer system, the Nullsoft Scriptable Install System became an alternative to commercial products like InstallShield. The company’s name is a parody of Microsoft. Mike the Llama is the company’s mascot; this is frequently referred to in promotional material citing llamas. Frankel introduced the llama in Winamp’s startup sound clip, inspired by the lyrics of Wesley Willis: “Winamp, it really whips the llama’s ass!” Nullsoft was sold to AOL on June 1, 1999, and thereafter existed as a subsidiary of the company. After the acquisition, Nullsoft headquarters were moved to San Francisco, California. Their later developments included the Nullsoft Streaming Video format, which was intended to stream media that used any audio or video codec.