mu.lab is a free cross platform DAW. It's not exactly packed full of features, but it looks pretty easy to use and allows you to host VST's so could be used as a basic audio editing package.
" MU.LAB is an alternative, state of the art software application for OSX and Windows, transforming your computer into a real music studio!
It does not overwhelm you with a complex feature set, in which you can get lost.
On the contrary, MU.LAB is a user-friendly yet rock-solid musical tool designed to create, finetune and play Your Music!
MU.LAB's core feature set:
* Audio Recording & Playback
* MIDI Recording & Playback
* Flexible Composition & Sequence Editing
* Supports Audio and MIDI VST Plugins
* Powerful Audio and MIDI Plugin Routing (up to 100% modular if you want)
* Integrated high quality synths, samplers and effects
* High quality Audio Engine
* Sample Accurate Sequencing
* Available for OSX (Universal Binary) and Windows"