Wavosoaur is a powerful, free audio editor that combines all the standard audio and sound editing capabilities you would expect plus the ability to use VST plugins, real-time processing, audio stream input-output (ASIO), drivers. It runs independently, so it does not require any installation.
Features:
Fully-featured audio editing packaged, which is free to download and provides a wealth of tools. It combines standard editing features with a series of advanced capabilities such as VST processing, audio analysis, and specialist features.
Provides a wealth of standard editing features and VST support
It's tiny download size, "what you see is what you get" interface, lack of installation requirement and packed feature set means that it is non-destructive audio editing can start straight away at zero cost. The support for ASIO means you can experience low latency, so you don't experience lag when you're recording and editing.
Wavosaur is ad-free and comes with some skins that allow you to customize the look and feel to your own preferences.