BusyMax – Free & Open-Source Calendar & Task Manager for Linux

Google

Google Calendar and Google Tasks are available for personal Google accounts and Google Workspace. Google Meet links can be added to events on supported calendars. (Google Workspace)

Microsoft

Outlook calendars and Microsoft To Do cover personal Microsoft accounts and Microsoft 365 work or school accounts. The integration includes Teams meeting links, To Do checklist steps, importance and categories. (Microsoft Support)

iCloud

Private and shared iCloud calendars are accessible on Linux through an Apple account. Calendar access does not require publishing a public subscription link or importing a calendar file.

Nextcloud

Nextcloud Calendar and Nextcloud Tasks connect to a chosen server, including self-hosted installations. Task controls include nested subtasks, numeric priority, status and completion percentage.

WebCal calendar subscriptions are also supported in read-only mode.

BusyMax – Free & Open-Source Calendar & Task Manager for Linux

Google

Microsoft

iCloud

Nextcloud

Calendar events

Tasks

Views

Desktop and synchronization

Keyboard shortcuts

General

Keyboard shortcuts

Settings

Search

Navigation

Toggle sidebar

Next period

Previous period

Jump to today

Create and edit

New event

New task

Save item

Delete item

Task editing

Cancel editing

View

Day

Week

Month

Year

Agenda

Google

Microsoft

iCloud

Nextcloud

Event detailsTimed and all-day events include descriptions, locations, calendar selection and time-zone controls.

Scheduling on the calendarEvents can be created by selecting a time range, then moved or resized directly in Day and Week views.

Repeating events and remindersEvents support reminders and daily, weekly, monthly or yearly repetition. Occurrence and series editing depend on the provider.

Guests and online meetingsMeeting controls include guests and invitation responses. Google Meet and Teams links are available on calendars that support them.

Calendar filesCalendar files can be previewed before import. Individual events and tasks can be exported as iCalendar files.

Notes and subtasksTasks support notes and subtasks, with checklist steps in Microsoft To Do.

Dates, reminders and repetitionAll three task services support due dates. Microsoft To Do and Nextcloud also support start dates, times, reminders and repeating tasks.

Priority and progressMicrosoft To Do supports importance and categories. Nextcloud also provides task status, completion percentage and numeric priority.

Lists and task organizationTask lists can be created, renamed and deleted. Google and Nextcloud support cross-list moves; Nextcloud also supports duplication and moving complete task branches.

AgendaEvents and tasks grouped by date, with overdue and undated tasks available separately.

DayTimed and all-day items for one date.

WeekEvents and scheduled tasks across the week.

MonthEvents and tasks within the month, with navigation into individual days.

YearTwelve months with activity markers and navigation into a month, week or day.

Tray overviewUpcoming events and the number of tasks due today appear in the tray menu, alongside actions for creating events and tasks.

RemindersEvent and task notifications include Open, Snooze and Dismiss actions.

Offline accessPreviously synchronized events and tasks remain available without an internet connection. Edits can be saved locally for later synchronization.