When is a DAW not a DAW? When it's a microDAW, of course, and this is how Juno Ju-X is pitching Hosting AU, its new free Mac app.
Designed to host Audio Units effect and instrument plugins, this comes with a 4+1 channel mixer, an external audio input, a 24-bit recorder and a "music typing kind of feature" known as LazyKey. This is a lean software machine that the developer says can be used as you would an old 4-channel multitracker.
Compatible with Max OS X 10.6 or later, you can download Hosting AU from the Juno Ju-X website.