ircamLab

ircamLab's TS audio editor is exceptional, especially if you'd like to take recordings and mutate them into something wildly different than what they once were. Also fine for simple trimming, etc. Time-stretch is beautiful, nearly perfect; none of the typical artefacts normally found in lower-quality time-stretching. The spectral effects are equally beautiful and quite smooth.

Fantastic audio editor from Ircamlab with state-of-the-art features for editing, sound design and remixing. The time-stretching quality alone is worth the price and is the best I've ever heard. Can't recommend this enough.

If you understand French, there's a great video overview by the designer which does it justice.

I have had it crash every time I have opened it on Win 10. Both as standalone and as Vst.

I still haven't been able to test it, due to crashes all the time.

This is my favorite tuner now. It shows the full spectrum of the string, in the huge spiral spectrum that moves as you tune the string. It zooms into your tuning by showing a rotating hexagon that represents the tuning of your string with respect to the tuning reference. It makes it fun to perform intonation on your guitar or other instrument.

This is different from most anything you probably have ever used. You can use it to see what notes are in a chord, to see what notes are being played in a recorded song, and it is great for tuning.