Thunderbird is a free and open source email, newsfeed, chat, and calendaring client

スケジュールを管理する

メールや連絡先、予定などを管理します

A simple kanban-styled planner

An amazing calendar widget

A simple graphical tool to purge old events from CalDAV calendars

Personal organizer

A time related task manager

Ethiopian calendar

A Persian/Jalali/Farsi calendar