The user-friendly, lightweight, and fast email client Latest Release: 3.19.0 / 4.1.0 (News), on 3 April 2022

The vCalendar plugin

The vCalendar plugin provides groupware features for Claws Mail, namely: The calendars and events are displayed in a list, in the same way that Claws Mail displays your emails.

libcurl is required,

Here are a few screenshots illustrating the features: