Talk and Comment- Google Chrome add-on, Android app. Once it has been installed, it allows you to record sound from any website you may be visiting. Then, it creates a link to your voice comment. Anyone can listen to it as long as they have the link, without the need to install the add-on.
https://vocaroo.com/: can record voice comments, then it generates a link to share, as well as a QR code. The link expires in some months.
Voice recorder: https://online-voice-recorder.com/ (generates .mp3 file to be downloaded).
Mobile devices: voice recorders such as: