1)   Tone Generator 2.10
NCH Sound Tone Generator lets you create audio tones, sweeps or noise waveforms using a Windows computer with a sound card.

 2)   White Noise Player 1.01
White Noise Player will play any .wav file on your computer you choose on a continuous loop cycle from your system tray. This allows you to choose any sound you like from simple white nose to a relaxing rainfall to reduce distrating ambient noise.