1)   RAL / Realtime Analyzer Light 2.0.0.2 Quality sound measurement software equivalent to at least US$10,000 hardware.You can use it for wide scope of audio and acoustics: car audio, home audio, concert hall and room acoustics, sound analysis and noise measurement. 2)   WinMLS 2000 3 Perform audio, acoustical and vibrational measurements user-friendly, accurate and flexible using a sound card. WinMLS2000 is widely used by pros. Now low-cost versions allow the amateur to perform professional loudspeaker and room measurements. 3)   Advanced Audio Corrector 2.0 Advanced audio corrector allows to remove the phase distortions in high-quality audio files (WAV, 16-bit Stereo) before coding to a format MP3. The program works in a batch mode. 4)   Perspective Pilot 1.1 Correct linear distortions of a perspective and adjust the angle of the horizon