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One of the easiest ways that companies can avoid animal testing is to work with products that are actually extensively utilized in human history and still have proven their safety after a while. Companies also can depend on data from natural and synthetic substances that are already previously tested on animals. Computer modeling and databases may be used to determine biological properties of ingredients making risk assessments. Flickr:Giorgos Gotsis: 1. Audacity: Audacity is probably the most widely used and free audio recording software programs, capturing the hearts of both sound engineers and casual audio mixing crowd. It can be used for audio recording from microphone, file conversion, cutting, copying and editing sound files. Its supported audio file formats include MP3, WAV, AIFF and OGG Vorbis. The Beta 1.3.13 is its latest version, that is now appropriate for windows 7, Windows Vista and Mac OS X 10.6.