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positive.code: 
  Sound Recorder is the default sounds recorder app in Gnome 3. It's OK for very simple usage, but the moment you want to start editing audio and improving audio quality, Sound Recorder doesn't offer anything.
  
  Audacity is brilliant. It's a bit intimidating in the amount of options it offers, but in terms of recording quality, editing the recordings and improving their quality, Audacity is the de-facto standard in open source, on Linux as well as on various other platforms. It's truly great 
  
  
  
  
negative.code: 
  All options available from the community (the built-in one, gtk-recordmydesktop and EasyScreencast) were disqualified for various reasons, either because of lack of maintenance, quircks or instability.
  
  Apart from the occasional crash (happens very seldomly), Screencastify works beautifully, however. I can record a window, a Chrome tab, or my whole desktop. Recording my voice over the videos works pretty well as well, using a USB microphone I bought for the purpose of creating screencasts.
  
  The downside of Screencastify is that it's a proprietary piece of software. For now, it's the clear winner, but in the future I'll give EasyScreencast a go for it's money again.
  
  
  === Recording audio on it's own
  