Siasoft developed Smaart Pro to provide sound system contractors, acoustical consultants and audio professionals with a practical, accurate, cost-effective and easy-to-use sound system optimization and acoustical analysis tool.
http://www.siasoft.com/
ETF software is a highly accurate PC based acoustic measurement system designed to meet the needs of both hi fi enthusiasts and professionals. Two channel MLS measurements provide accurate results with even low cost standard pc sound cards.
http://www.etfacoustic.com/