FreeSoftwareTools.net

SoundEditor is a freeware wave audio editor. Supports all the basic functions of an audio editor like cut,copy, paste and clear.

This program read and save only WAVE files.
Some features :
Read and save WAV format files
Copy/paste a Selection .
Sound Recorder .
Wave Synthetiser (square, sinus, saw, triangle and manual drawing).
Resampler (to change frequency, number of channels, etc.)
Fade-In, Fade-Out, Silence, Invert .
Filters: brilliance, derivative, volume, DoubleSpeed, Tremolo, StereoExpand, Echo .
Zoom horizontal and vertical.

The author of SoundEditor explains how to install and use VST plugins.