Do you mean the Lightning add-on[0] that is now bundled with Thunderbird [1]? I don't know if it's available as a stand-alone app. I use Thunderbird but not L

Do you mean the Lightning add-on[0] that is now bundled with Thunderbird [1]? I don't know if it's available as a stand-alone app. I use Thunderbird but not Lightning. [0]https://addons.mozilla.org/thunderbird/addon/lightning/ https://addons.mozilla.org/thunderbird/addon/lightning/ [1]https://support.mozilla.org/t5/Calendar/Integration-into-Thunderbird/ta-p/30027 https://support.mozilla.org/t5/Calendar/Integration-into-Thu...