AthTek Free Voice Changer is a handy audio tool for Windows users. It has a very clean interface without any exaggerated color and overstated features. It clearly lists 4 steps for you to obtain the sound effects you want.
.NET Excel Component - Nasosoft Excel v4.3 is a rich feature Excel control for C#/VB.NET to enable your application to read/write Exccel files. It supports Excel 95-2003 format and Excel 2007 format (.xlsx).