Killendar Steve the Killer

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Use this command to install Killendar with WinGet:

winget install --id=SteveTheKiller.Killendar -e

Killendar keeps your appointments in a single file on your own machine, with optional SQLCipher AES-256 encryption at rest once you set a password. Month, week, day and agenda views, color categories, recurring appointments, and iCalendar import and export. Unlocked it is an ordinary SQLite database you can read, back up, or copy to another machine. Runs portable or installs for you or every user - no account, no sync, no telemetry. Open source under GPLv3.

Free and open-source calendar for Windows with no account, no sync, and nothing phoning home. Month, week, day and agenda views, repeating appointments, color categories, iCalendar import and export, and optional AES-256 encryption at rest. Your appointments live in a single .kcal file on your own machine - an ordinary SQLite database until you put a password on it. Install or run portable. Single Windows EXE, ~3 MB, no runtime install required.

Internals, formats, storage details, and limits live on the technical page.

Features

Four views - month, week, day and agenda - with one shared previous / next / today control; Month zooms from one to six visible weeks and draws multi-day appointments as continuous runs
Appointments edited in a slide-out sidebar panel, not a dialog: title, start and end, all-day, location, description and attendees
Repeating appointments - daily, weekly on the days you tick, monthly or yearly, every N of those, ending never, after a count, or on a date - with per-date exceptions; editing or deleting one date asks whether you mean just that date or the whole series
Drag to move appointments across times and days; overlapping appointments sit side by side instead of hiding one behind the other
Color categories you define, painting every view; a 5-day work week toggle and a grid density control down to quarter hours
Import and export in the formats people actually hand you: iCalendar (.ics, RFC 5545) both ways, CSV in Outlook's column format both ways, saved email invites (.eml) in, and a themed month-by-month web page out with a print stylesheet
Optional encryption: the lock button puts a password on a Killendar and it is encrypted at rest with SQLCipher (AES-256, per-page HMAC-SHA512); opt-in, so no password means a plain readable SQLite file
As many Killendars as you like - work, on-call, family - each its own .kcal file with its own password or none; keep them in the default profile folder, another folder you choose, or beside the portable executable
Thirteen themes - Dark, Light, Black, 98SE, Blood, Greed, Cyanotic, Ectoplasm, Decay, Mourning, Sepulchre, Delirium and Malaise - four of them (Dark, Light, Black and 98SE) take six accent hues each, so 33 looks in all; twelve languages switchable without a restart (contribute via TRANSLATING.md)
Keyboard driven with single-key shortcuts; full keyboard shortcut overlay on F1 with list and visual keyboard views
Runs portable, or self-installs per-user (no UAC) or machine-wide ( for scripted deployment); uninstalls cleanly and never deletes your appointments


Month view - A full August of appointments, with all-day runs banded across the top of each day, on the Delirium theme.	Week view - A five-day work week, overlapping appointments packed into lanes, on the Decay theme.
Day view - One wall-to-wall day in the hour grid beside the day list, on the 98SE theme.	Shortcuts map - The F1 overlay's keyboard view, every bound key lit and labeled, on the Black theme.

Killendar Steve the Killer

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